I've been using the animation for krita a lot and there's still a lot of work to be done with it.
Exporting the files is a pain in the ass because it doesn't convert to any video formats, just sequences of images- so I have to compile this images together in a video editing software somewhere.
Also, if the file is too big Krita will start overload and just completely stop working then crash. So now what have to do is get the images then rotoscope it or do some other bullshit and redraw my rough animations on another program.
This is a rough animation that I was working in:
The first gif was running smoothly.
The second gif started to crash constantly and it took a lot of time for some of the frames to render.
I should wait for the program to develop a little bit more, but it's one of the most satisfying and efficient programs I've used to this date.