PvP is one of the areas of the game in which I dabble the least.
I did some back in… I want to say WotLK and Cata… when I was farming the mounts. I did a tiny bit in MoP, for the legendary cloak. WoD, too.
And of course, I loved the original Korrak’s Revenge. Shame that they ruined it.
But, I read that thread and I think I understood maybe a third of it. 
There’s a few things which popped into my mind, though:
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Yes, there needs to be more incentives. Mounts that’s simple to obtain, for one. (I’m not talking about the current system. I’m talking about the original system from pre-Legion.) That’s an example of a carrot to dangle in front of players.
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I, as a dirty PvE player who knows a minuscule amount about PvP, would like to see the old map objectives matter again — aka, the towers in AV. That’s why I liked Korrak’s Revenge so much; I snuck all over the map on my rogues and druids, capping the towers. But whenever I go reading threads, people are saying that the map objectives no longer matter in retail. Is this true? I haven’t really hopped into BGs to check it out.
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New maps are sorely needed!! I actually miss the old Strand of Ancients — I liked using the cannon to blow up Ally players on the beach. Lol.
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I detest the constant stunlocks. That’s always, always been the main thing which prevented me from really getting into PvP. Yes, I know there’s trinkets for it, but they’ve got a cooldown, and I’ve experienced rogues stunlocking me multiple times in a row. Not fun!
…like I said, I’m a dirty PvE player who knows very little about PvP.
I’ve dabbled in enough BGs that I’m familiar with most maps, and I prefer the maps where objectives actually matter… because at least there, I could act as a semi-effective distraction and lure the enemies away. (People just can’t resist killing a Hunter. LOL)