Similar issue here. Playing on a Surface Pro 4 (intel core i5, 8gb ram, intel hd graphics 520) and had near perfect performance before 6.5. 6.5.3 fixed the problems with the outdoor arenas (black screen), but stuttering and slowdowns have become quite frequent when there weren't any before.Here I'm gonna comment on both 0.6.5.2 and 0.6.5.3.
So, outdoor arenas are AMAZING!
Combat seems to be more fluid, though it may be just a placebo effect, but who knows...
Unfortunately, there's also something strange going on...
Recently, I bought a new notebook - much better one than what I had before.
My previous notebook specs:
- Intel i3
- 3 GB RAM
- ATI Mobility Radeon HD 5000 Series
My new notebook specs:
- Intel i3 6100U
- 8 GB RAM
- Intel HD Graphics 520
So, the point is that every single game runs much better/smoother on my new notebook... except "Exanima". Sadly, it runs even worse. 0.6.5.3 update didn't help either I've got 60 FPS only in arenas. In arena hub location and story mode it's about 30 FPS with screen stuttering every few seconds. This stuttering was nowhere to be found while playing on my previous notebook.
Edit: Should add, cursor movement seems somehow more sluggish/less responsive than before 6.5.
Still enjoying it immensely, though! Love the new arenas, music, and items.