It really is, it's super fun! It does need some work, especially extra optimisations, but all that's coming I'm sure.
Yeah, the swamp area leading up to the orphanage was especially a killer on my system. But I'm sure they will fix it and once it comes out of beta it'll be just fine.
BTW, I watched your video and I've seen the textures looking better than I see there. You should check your options because I'm pretty damned sure I've seen better on my own system. Painkiller H&D defaulted to medium to me. On the other hand the grim reaper doesn't seem to get much better...
https://dl.dropboxusercontent.com/u/28944/Painkiller/Screen Shot 2014-05-30 at 4.25.03 AM.png
On the other hand I have noticed some textures actually looking better on the original version of the game Painkiller Black.

(that grim reaper guy wasn't one of those things though he's brand new here)
H&D:
https://dl.dropboxusercontent.com/u/28944/Painkiller/PKHD_01.png
original:
https://dl.dropboxusercontent.com/u/28944/Painkiller/PKB_58.jpg
(I loved effects the original had such as refraction in the glass which H&D lacks)
I tried to enable antialiasing at least by the .ini file here but it doesn't seem to be a thing for this game. The engine .ini file has references to temporal antialiasing and MLAA though. When I played it in parallels it of course didn't have it there either but I blamed that on the fact that parallels doesn't have multisample support and even post process antialiasing like MLAA or FXAA hinges on that support being available.
In the original painkiller games I could turn up to 6xMSAA which looks really smooth espeically at 2560x1440.
Also, I hope they update the sound to support multichannel as that's one thing I miss on it compared to playing it in parallels. The sound panning in stereo mode seems pretty bad too.
However, even at this state it plays better than it did there (on parallels).. on there I had more stuttering going on because parallels for example only lets me use about half of my VRAM at any given time.
By the way for the people who mentioned gamepads.. I have a wireless x360 pad here too (mine's a custom one with custom faceplate and evil controller backplate, and custom colored buttons) and use it for many games. Particularly ones that are third person, or side scrolling. But I still insist on using keyboard and mouse for FPS games.
