HOLD IT! I know it's for the best. I know it'll be better for everyone in the long term, but I've just heard the news that Ace Attorney 5 is going to have new, proper voice recordings to replace the old catchphrases SFX, and I don't know I feel about that!
In an interview with Japanese magazine Nintendo dream (as reported by Siliconera) the producers discussed the move away from the well known traditional SFX, and admitted it might be problematic for long term fans of the series.
But the reasoning behind the decision was two fold -- the new sound architecture of the 3DS was making it difficult to translate the old SFX, particularly when it came the new 3DS surround sound capabilities. This, in addition to the fact the team wanted to create proper voices to match the game's new cut-scenes, meant that Ace Attorney 5 required a step forward in this area. The cut-scenes are going to be fully voiced, so reverting back to the old SFX for the game itself may have been a little jarring.
It's probably for the best. I remember really finding it difficult, for example, to get used to the fact that Guybrush Threepwood was talking with an American accent in Monkey Island III -- but you get over these silly little details with time. Considering Phoenix Wright hasn't had a makeover since the GBA days, it might be an overdue reinvention.