(Can skip reading this sentence)V
At this point, they probably just ignored that a thing that they could implement and decided that their own convenience is more valuable then the convenience of their player base.
In vindi, people don't kick people base on what class they pick, so you don't have to worry about that, also we don't really make premade raid anyway except for neamhain. For neamhain, i uselly just pug it and get it done normally but if you want stress free clear then making a somewhat premade will lessen the headack of getting a party together or jsut having friend you know who run it and getting them to join also helps.
Also, CB Vella is frairly strong. Lynn is one of the weakest char in the game cus of how difficult it is to optimize dps with her but people still have them join their endgame raid(Neamhain). Think we jsut got past the point of caring about kicking people from raid and jsut carry people and hope they get better gear later.
Only time you would see a kick from a run would be of a few cases: Holding a spot for a friend/guildy; Player been afk for too long and not readied; the host don't like the person(never seen this in action but could happen to some people); or to mess with a friend by kicking them from party