I could see them acting as mentors to young heroes as part of the storyline...but actively going out and arresting others does not ring true for me.
Angel is on Krakoa in the background...and Vance's only appearances I can think of are briefly in Outlawed 1 and a name drop in the latest FF.
not to but I really want to see mutants that DON'T want anything to do with Krakoa for whatever their reasons are. I thought that would be a good storyline for people like Angel and Vance.