Final re-timed version of Dirnae's animations: http://www.tesnexus.com/downloads/file.php?id=31635
Solves first-person footstep speed and most stutters.
Dirnae, please link it up if possible. That was fun, though you need to work on your looping. RunForward needed quite a bit of editing.
MCP animation engine patch is to add new animation capability to the engine, but I don't think I can fix stutters this time. It's just too hard to work with.
Found an issue, I'm not sure if it's just your version or Dirnae's version too.
Try finding an ash storm (coc Ald'ruhn?
), and walk (not run) with the ash blowing from the left or right. Try holding W and A or W and E to walk in different directions. Sometimes the animation stops and you are pushed back a little by the storm. It's pretty weird. Something similar happens in the original game (a slight interruption of the animation) but then you'd just keep moving. I'm guessing it's the delay between the start of Dirnae's walking animation and your character actually moving forward that's causing the issue with the animation replacer. It doesn't happen while running, and from what I can tell the direction in which you walk compared to the direction of the storm matters.
I see it happening to NPCs too.
On the bright side, while confirming that this doesn't happen with the vanilla animations I came to the conclusion (again) that the original animations svck and your animation replacer is absolutely essential Dirnae!
If you can't reproduce this I can make a short video if you want.