From my experience, the game seems to simply cap framerates as a builtin feature. When you pick any card (for example, Frost Bolt) the game goes into 60 fps and smoothens the animations.
Are you experiencing stuttering? If not, I have a feeling that “feature” is built in the game.
As I have not felt the game to be sluggish, I have not looked elsewhere if the game is, in fact, capped.
Cap is 30 on medium / low graphics. 60 on High graphics. I just retested HS on DXVK and it works fine on 60 fps with nice frametimings. I have the same driver as you, with a 970.
So I tried to set the graphics to High and yes, the 30fps cap was lifted but I still only get about 45fps in the menus.
When I start a game it goes down to about 32 fps. Do you get a stable 60 on high settings?
What am I missing here?
World of Warcraft runs with about 100-80fps on high/medium settings, there must be some tweak or Lutris setting I am missing somewhere.
Yes, stable at 60 fps. Sounds really wierd that you have such low numbers. Try a fresh prefix. (just move the actual game data outside the prefix somewhere and point the new Blizzard App towards that location).