Some (like girls who are X-Men fans) may complain that Jean Grey, Rouge, and Storm were not playable characters and call these X-Men games very sexest, but you got Psylocke - what more do you want!?  It would be nice to have them, but Jean, Rouge, and Storm would be unfair because they can fly and are too powerful.  If they were included in the game, developers would have to dramtically limit their powers (to make them well balance with other X-Men) and that would piss off gamers.