I think they will fix those frames but I don't wanna jump on the boat and sail to the "It will all be corrected" island. I think it would be incredibly tacky to update the speeches and leave the same jumpy frames in the transformations for Eternal.
I think they will add new things as they did redo Venus in Eternal some, and while it looks awkward still with jumpy frames, it certainly wasn't the mess it was in Crystal Season III.
Once again, I don't know how hard it is but they should have left the transformations as they were choreographed in S1-S2 and just made them in the current style because nothing was wrong with them.
I'll be honest, while I don't exactly expect them to fix all things, I'll be very irritated if we get certain things like Jupiter Oak Evolution, Mars, Jupiter, and Venus ending transformation sequences fixed.
From the looks of things from the trailers I e seen they seem like they are going to get some updates and equal treatment this time...