English voice acting tends to be treated as one-and-done or contracted for a specific period under the notion that they wouldn't be needed later. A classically bad example of this was the Dragonball/Dragonball Z series where they had around 3-4 different voices for Goku, 2-3 for Vegeta and Picollo. It's not really bad management, either. It's about predicting demand in relation to budget and contract time. Yoshida probably had the original voice actors only contracted up to the completion of all of 2.0's voiced cutscenes. You know, treating XIV like his Final Fantasy MMO. I have no doubt he tried to get his old voice actors back but they probably wanted more money so he went with someone else. Probably how we got different Gokus and Vegetas, too.