I feel like some/all of my feedback may have been said above, so sorry for duplication, but here is my feedback.
Overall, I find Sunfury Fire in a great spot and had a lot of fun with it. I don’t have any specific pieces of feedback for it. My feedback largely focuses on Arcane.
Arcane Sunfury
Glorious Incandescence
I found Arcane Sunfury fun at first, but the more I played with it the more frustrating I found it. Trying to trigger meteorites using a long cooldown such as Arcane Orb was annoying at best, and it made it hard to actually use it when you wanted to use it. On fire, you could spam spawn them during combust quite easily. I don’t think Orb is the right trigger for this ability.
Sphere generation
I found generating sunfire spheres to be quite slow (frustratingly so) on Arcane vs Fire. On Fire, I could quickly generate a few before I went into a combust opener that felt good. On Arcane, I drain all of my mana trying to get it before using Evocation and going into my opener and sit with 1 sphere. The generation on Arcane is too slow comparatively to Fire, and it feels bad.
Ignite the Future
This feels like the choice node where it’s the easier one of the two - where you don’t have to play around generating as many spheres? I guess? I honestly don’t really understand the choice here. It seems like a weaker choice and doesn’t really offer an easier/different gameplay.
Arcane Soul
This feels rather clunky and not very rewarding. When exiting combust and having a predictable immediate hyperthermia, when you’ve just exausted your fire blasts, feels good. Having Arcane Barrage just give back charges and do damage, that isn’t really better than just spamming Arcane Blast, feels bad. Maybe make it so Arcane Blast casts faster and/or has zero mana cost for 5s instead?
Mana Addiction
Reasonably happy with this talent. It is what initially made this tree feel better for me.
Theme and visuals
The theme of Sunfury is top notch, but definitely favours fire over arcane. The orbs are a mix of Fire and Arcane already but seem more fire than arcane. It’d be great if it was more arcane than fire in Arcane spec. I’d also love to see an option to hide the spheres out of combat - maybe a glyph?
I saw it above, but I second the notion that having a recoloured arcane bird would be nice, too.
Spellslinger
Spellfrost Teachings
As the name may imply, spellfrost teachings really feels like a better talent for Frost. Having Frozen Orb resets feels amazing in both AoE and ST situations. Having Arcane Orb reset feels sometimes ok in AoE and negligible in ST. Having an RNG reset on something isn’t really a great feel for Arcane in general, to be honest.
Unerring Prophecy
I don’t love that it’s pushing a clear utility ability into a damage usage ability. I’ve been talenting into Volatile Magic because of it.
Force of Will
Seems uninspired.
Splinters and Splinterstorm. Theme and visuals
Overall, these are great to use. The clearcasting from splinterstorm feels nice, assuming you don’t overcap because of it. My only thought is that the visuals are a little too tame. I originally had to struggle to even see the splinters - now that I know what to look for I see them, but I think they could use some more flair.
Spec Tree
Slipstream
This ability is very iconic for arcane and it feels bad to not have it. Right now, you have to go out of your way to get it. This would be better placed in a path towards something big - or better yet, make it baseline.
Pathing
Currently, you are locked into a ‘side’ after the 5th row. On Fire and Frost, it’s the 8th row. This severely limits choice. Choice is even further handicapped by the amount of throughput options in the tree, which loops back to making it hard to pick Slipstream.
Charged Orb
I feel pressured into taking this in Sunfury ST for the added orb to spawn meteorites (I have no idea if that is actually better, but it feels right). I don’t think that’s right. Choosing charged orb seems like it should be an AoE choice.
Evocation and Siphon Storm
These are a very strong cooldown that is shoved off to the side of the tree. Given their power in both AoE and ST, they should be more central.
Class Tree
Time Anomaly, Temporal Warp, Inspired Intellect
I am glad Temporal Warp is gone. That is a good change. It felt bad not being able to use lust on pull and miss out on uses. Time anomaly isn’t great, and inspired intellect is ironically uninspired. I’d love it if all 3 of these talents were removed, and you put Cauterize here as the capstone. Having a cheat death gives Fire an edge in progression and high mythic plus that limits spec choice and freedom.
Shifting Power
Shifting Power felt great on Fire Mage in the first season of Shadowlands because it made you a minute mage. It does not feel good on Arcane. More often than not, it desyncs your cooldowns from your trinkets and then you either have to pop your trinket like 10s before your first CD usage and then part way into your second usage, desync your CD and trinket or hold your CD or trinket. All of those feel bad. Delete shifting power.