This wouldn't even be possible at this point. They've changed the internal way so many things have been handled that there simply would be no way to revert to such old versions of the skills. They'd have to completely re-write them from scratch to mimic the old functionality and at that point, what would be the difference between that and waiting for the full refresh?
Many of the changes they make are numbers adjustments. The actual animations etc are all basically the same. They are programmers. This is the game they program. They could snap it out in a week easily.