Well, yes.
It's because of two things:
the VAs are getting used to their roles and are much more comfortable then at the beginning when they had to try to live up to the expectations of the fans and try to sound like the character's old VAs rather then themselves. (although that pressure still remains.)
secondly, it's because we are getting used to the new voices rather then the old ones (although some characters *coughMr.ContesaAshcough* still need some work.)