I hate to be that PLOTHOLES! INCONSISTENCIES! doofus, but what happened with Colossus X-Men no killing rule? I mean, he sends/let them take Deadpool to prison for killing a single person but then at the end Deadpool kill the entire hospital staff and he doesn't make a peep, he even smiles? Also, for a superhero movie that boasts about not being like other conventional superhero movies, unnecessarily having hordes of faceless people to kill at the third act surely is very superhero-y.
Anyway, this is approaching the first one levels of terrible after sleeping on it.