Hi there! I play mostly arms and mostly care about M+, so my feedback will be coming from that point of view.
Thematically:
I think it’s cool! Although thunder clap has evolved into being more of an arms/prot ability, when trying to recreate the mountain king, it just makes sense to lean on that ability more, and that it be a dual wielding character. To that end I would even go further with the changes, and have it incentivize dual wielding as prot, replacing some of the defensives leaned on like shield block. Fury prot in classic was kind of cool! I think mountain thane should do something similar for prot in retail.
However, I am concerned in that the mountain king is also iconic for avatar, and this is leaning into that. For a lot of my feedback I’ll have to be reserved as I haven’t seen and can’t envision what slayer or colossus will look like, but I am concerned that multiple abilities that have become iconic for arms and prot are now being pulled into a fury-only spec. Similar to when bladestorm was in fury’s talents, it muddles the waters a bit and makes it harder for me to define my identity as an arms warrior.
Mechanically:
As far as how it is changing how damage is done, I don’t really have many notes. I only really play fury when arms isn’t viable in M+ (which hasn’t happened so far in DF), so it’s harder for me to envision how this changes up the rotation. But I think making thunderclap into a sort of replacement for whirlwind works well for fury.
My main concern is the AOE storm bolt talent. It seems a little underwhelming compared to utility that other specs have access to for dungeon runs, but if it is tuned properly (make it up to 5 targets, or increase stun duration to 4 secs on the 3 targets) then a whole new concern pops up. Am I going to have to play fury now in dungeons because the other specs won’t be getting the same kind of utility advantage?
This probably goes outside the bounds of feedback for the thane, but I am concerned that we’re going to get into another situation where I’m forced to swap to fury, or that DPS warrior will lack utility that other classes can bring, and therefore we will have a harder time finding groups for keys. I want to see the class get some real juice that’s going to make it more viable, especially with the recent nerf to rallying cry. Back in the DF beta heroic leap was going to have an optional talent making it into a short-range mass grip, and I was so sad to see it didn’t make it into the final game. I understand M+ isn’t the only version of the game that needs to be balanced for, but I am honestly getting tired of having my favorite class lacking utility to such a degree that I feel like I’m just waiting for tuning to randomly work out and catapult me into the meta (or simply being viable).
I think DPS warrior in particular needs love in the utility department and has for some time, so I’m looking forward to seeing what the slayer tree has to offer. As prot can’t touch it, this seems like the perfect opportunity to give arms and fury something big that people love to bring for dungeons. And by big, I’m thinking really big. Bloodlust, mass grip heroic leap, hugely empowered intimidating shout. Something like that.
If you’ve ready this far, thanks for taking the time. Really looking forward to war within (and having a blast with season of discovery for that matter), just want to see these trees be the best that they can be.