On one hand, it's really surprising that they actually brought in Mike Pollock to voice his lines in-person with the other actors, since he lives in New York while the rest of the cast is in LA. On the other, Why did they replace Kate Higgins as Tails?! D:
Her performance as him in the last few games was great. The voice fit him perfectly, and he often got some of the best lines in the games. The replacement seems to be fine, but it also seems like they're just having her do an impression of Kate, so why not just keep her?
Travis Willingham seems to be having the time of his life as Knuckles though, and that's great to see! Though, a part of me keeps imagining those lines coming from Roy Mustang x3