Thanks for the feedback, guys! I'll try to add the frames, though do you now an easier way for the animation composition?
My source file for the single frames looked like this.

Right now I think it the easiest way would be to use the RM2k3, setting Kaz' body and the bg as panorama backdrop, taking the arms as picture overlay animated via a parallel process and doing the mouth ani as battle animation. Afterwards I'd grab the finished animation with Animget. I dunno if anybody understands what I'm talking about, but this way I should have way better timing control than I could ever have with CS6 or Animator.exe and I could actually concentrate on matching the lip movement to the words instead of just doing a simple babble-loop like it's now
As for the bg, I noticed the issue on the steel beams, though I fear they may turn out even jaggier when I try to edit it over again. To be honest, I just used a thick line tool and layered each stroke over another. But I can assure you it wouldn't be noticeable on a CRT.

I have my Wuu currently hooked on my old TV and I checked the pic there. While not a perfect rendition there (because of the scaling and higher resolution) it's somehow much more satisfying to look at your pixelart on an oldschool tube as opposed to an LCD. I can only recommend to try it out if you have the possibilty.