I think that beats the very purpose of reset. also, there aren’t much character-bound items and achievements that are worth spending a 100 TP for. it’s better to just reward players for making new high leveled characters (team level, etc.) and make the reset cost probably around 500-1000 TP depending on the mechanics. It shouldn’t cost less than costumes and team name reset. I think somebody already suggested that they reset only the class ranks to rank 1 class level 1 and grind exp back up. this way, those who resets still require grinding exp.
that or the one you suggested but with exp bonus and higher TP cost.