The difference there is THAT Alpha team was the ONLY team. Also the fact it was poorly written hindered it. The X franchise does this a lot with student characters, sometimes it works and sometimes it doesn't but either way it grows a supporting cast and sometimes new favorites emerge. I like the return of some vets too (although past Byrne's creations none really grew on me except perhaps Persuasion) but I certainly would never want to limit Fred 'n Greg's (I refuse to use the term Freg) creativity if they want to give us new members.