It probably is, as far the lore is concerned. It’s a night elf city ruled by Alliance night elves, directly connected to two other Alliance capitals. The Horde are explicitly guests in Tyrande’s city, tolerated for their good behavior.
There’s a better chance of Neo Silvermoon following that template than canonically leaving the Horde for no reason or ceding half the kingdom to the Alliance IMO. At that point Zul’Aman unironically does become the more appealing expansion capital. 
It is in lore. Hamuul is literally the only Horde NPC there. You want to turn Silvermoon in the next Dalaran.
Horde is allowed to be here, Horde playersrepresent the Horde so it’s a neutral city 
I really don’t care if Silvermoon becomes a neutral city or not but I doubt they will update a whole city like this just to please the players.
I think it will be an important city in Midnight like Valdrakken could be it.
All I want is to keep the Eversong Woods and Ghostlands like they are and expand the Amani territory but I’m not sure it will happen.
It’s time the Kirin Tor go back in the Alliance and the Sunreaver go back to the Horde 
Gilneas reclamation says hello. Silvermoon is and always will be the blood elf turf and there is no reason to change that.
Gilneas is neutral too
We will see this in Midnight
I dont know about this. If anything breaking down the barriers further might actually be WoW’s future. We will see.
I think there’s a gameplay problem that further restricts how broken down the faction system can be.
It’s pretty baked into old content, and getting rid of it all together would essentially break that old content.
I think going forward they’ll be ignoring factions more and more rather than outright getting rid of them. Unless we somehow get a new Warcraft MMO the system is here to stay, I fear.
It’s not breaking down barriers. You people make it sound like the second fall of the Berlin Wall. It’s breaking a core feature of the game. WoW is Red vs Blue.
WoW at this point has burnt all the player base goodwill for faction conflict after it being tread (poorly) so many times. It was always sort of an artificial divide, which they have undermined themselves with some of their story choices.
Likely for the best if we move past that.
Big calim there boss. Hasn’t burned my goodwill. In fact I’m pretty sure people who get all happy for this faction merging thing have no idea what they are talking about. A huge part of this game is red vs blue. That’s not debatable, it’s how it’s always been. Now you people decided it’s outdated, or it’s wrong, for what reason I don’t know, cause I keep hearing all kinds of reasons, but you have no clue what’s gonna happen if you get your one true wish and bollox up the factions. So you telling me is for the best, is, if nothing else, laughable.
Here’s a better idea, write a good conflict by hiring consultants that know what the hell they are doing.
Or if they’re incapable of doing that just return it back to a cold war with classic/bc/wrath/WoD levels of heat.
God, you people need to learn what neutral means.
The faction barriers are going away. Cross faction grouping is a thing. Cross faction guilds are a thing. The language barrier is probably going away at some point. Blizzard has already confirmed that they’re working on allowing cross-faction queuing so doing Heroics or Timewalking with a cross faction group will soon be possible etc… etc…
It’s not a debate or a hypothetical. And frankly it’s not only following in the footsteps of every other MMO that tried to implement a WoW-like faction system but the game’s own Classic version. Where the biggest most popular realms are not the ones with the most evenly balanced factions but the ones that are utterly dominated by one faction or the other. Because players don’t actually care about Red vs Blue. They care about having the largest possible pool of other players to play with. That’s it. Utility over marketing or “faction pride” every time.
That doesn’t mean that the Alliance and Horde need to go away in universe or that the setting needs to become D&D. But it should be recognized that the faction divide and faction conflict are far from loading bearing pillars of WoW at this point. Blizzard built a game that had them, just not a game that really needs them.
We can now group for pvp, pve and even join the same guilds. These would have been unthinkable a few expansions ago. And they have said they might loosen the faction divide EVEN MORE. This is s one way street. Hell, if all quest nowadays are “neutral” quests all it would really take is try and make older quests doable by both faction(maybe add some sort of NPC that lets you be friendly with the other faction)
Nothing wrong with loosening the faction divide. I’m all for people being able to group up for content, what I have a problem with is when certain types here use the fact that’s happening to demand that Blizzard removes the factions entirely. Which is very dumb in my opinion.
Sure, we can group together to kill dragons or throw stuff in soups, whatever, but at the end of the day we are still Horde and Alliance. When the fun is over, we both go back to our respective homes. That’s how it’s always been and I don’t hear any argument why that should change.
What’s actually punishing, op, was reading your post
You really can’t? After all the salt about Amadrisil?
Of course going in there with Alleria leading what is going on is more of an Alliance take-over of Silvermoon, compared to going into Amadrasil under Alliance leaders and having to be grateful just to not be treated as enemies.
Yall care about the lore or the mechanics of the thing.
I’m pretty sure in lore Silvermoon will always be horde territory. Allowing alliance visitors doesnt change that.
Mechanically, it might happen the place to work as a hub for the expansion, is that a huge deal?
Game mechanics and lore cover it all. Even “story” is just the extension of lore.
But the bottom line is you had plenty of chance to understand you question since so many Alliance posters had already complained about it. And yes, going in territory that isn’t yours (never claimed otherwise) and serving the other side will never be the same as going in serving your own leaders who the other side has acquiesced to.
What about Northern Lordaeron that zone that wasn’t opened up as a zone near Stratholme and Quel’thalas. I mean that would be a good spot for the Alliance to have a High Elven Void Harbor City of their own and having boat travels from that City to Stormwind and New Night Elf City. Meanwhile the Horde can still keep silvermoon as updated city with boat travels from Silvermoon to Ogrimmar and Suramar, and all kinds of stuff.