I made a “feature request” concerning this two weeks ago: Allow player to freely choose hero costume separately for each team
I think this is the most frustrating aspect of the game currently. What’s more I do not see any monetary gain or other reason for SGG to keep the current behaviour. It is just complete nuisance to change costumes back and forth. Example: Want to use costume Kiril for titan attack to have defense down ability, while having the Kiril in other teams for attack up buff. Why cannot I set once the titan team and have others (especially defense teams) not affected? Or the class quests - one often has to choose costumes there because of the class, and thus mess up everything else. And then when changing back the hero disappears from the class quest team.