I've seen some complaints of the roster(s) chosen for the books and I thought about having a thread about changes you'd make when choosing the line-ups. To keep this a bit different than other threads asking to create your own line-ups, I've gonna have to give the suggestion/guideline to only use characters already announced or used in a book already. Also try not to add or subtract too many members from a particular roster. Otherwise, have at it.
That said, I'll go first.
X-Men
No changes, it's a rotating roster.
Marauders
Gambit
(leader due to nature, Storm basically is leading though)
Storm
Rogue
Kwannon
Moonstar
Pyro
Mission Statement; same as before, but powered by the Thieves & Assassins Guild instead of the Hellfire Trading Company
X-Force
Sunspot
(leader, bringing back the AIM connection)
Bishop
Emma Frost
Sage
Domino
Wolverine
Cypher
Misson Statement; same, but more members clearly associated with espionage, information gathering or black-ops
Excalibur
Psylocke
(leader)
Wolfsbane
Chamber
Colossus
Magik
Black Tom
Mondo
Mission Statement; same, now full of Europeans! Also magic.
New Mutants
Jean Grey
(leader)
Iceman
Beast
Shadowcat
Karma
Jubilee
Rictor
Quintin
Mission Statement; less of a rescue Cannonball mission, more of a teach new generation of mutants who might also go to space for some reason!
Fallen Angels
Kid Cable
X-23
Apocalpyse
Misson Statement; same edgyness, more Apocalypse x K!Cable drama.