Infinite Undiscovery: tri-Ace cut a lot of stuff out of the final game. It really did feel incomplete. =/
Star Ocean: The Last Hope: They changed a lot of Star Ocean standards leaning towards more towards what they did in Till the End of Time than their old 2D games. Also, every character is gained running straight through the story unlike the previous 3 games (minus Blue Sphere) where there were multiple alternate and/or optional party members to be gained.
Star Ocean: Second Evolution: They renamed too much of everything and redid some voices that used to be awesome. Dias and Ashton don't sound as cool anymore. =/