nimations don't pay much heed to the joint structure (which in itself is unrealistic).
That's what I was trying to say here, but i don't think he wants to listen. Even if the wings are entirely alien in structure they still have to make some sort of sense, or else they're going to look wrong.
Which is why I take no issue with the first two (other than the second one being bent at an unpleasant lookin angle, which is easy to fix.) but the thrid one just looks bad to me.
I'm not trying to be extra harsh or anything, bu the plain truth of it is, the third form's wings don't even look like a logical progression from the first two, and the outmost 'bones',while being well shaded and correctly colord, aren't shaped in a very visually pleasing manner.
Think of them more as tentacles then joints.
then have them behave as tentacles rather than joints! I see you kinda started doing that with the most recent animation, but only on the innermost 'tentacles, it would make sense if a similar motion were to be added to other others but i don't see it happening there.
And yes; add more frames. just one or two would be enough.
there's no point in getting C&C if you're not going to yield to any of it.