Lanefan
Victoria Rules
Terms like "relegating" are IMO the issue here. A goalie can't win a hockey game by himself, he needs defenders in front of him to help and - ideally - a forward or two who can score at the other end.Alternatively, you could actually design a game where each person is an important team member, from the word go. Then, there wouldn't be any relegating people to just being bodyguards of the ones who actually get stuff done.
Defencemen aren't "relegated" to helping the goalie keep pucks out of the net. It's their job, and they generally take pride in doing it well.
Ditto for an RPG combat. If supporting the blast mage is our best path to winning then that's what needs to be done. On other occasions beefing up and supporting the front-liners is the best path to winning, so that's what needs to be done.
As long as the party as a whole is "getting stuff done", that's all that matters - isn't it?