There is a problem with this, the 2's healer teams will be even more imbalanced (i.e. even harder to kill a healed person). I think those brackets and any 1's or 2's section of the game that gives rewards - even achievements - must be removed (completely). Right now people go 2xDPS but it's not really able to compete with a team of equal skill that has a healer. Sure you may be able to get some rating, but are you able to be on equal ground with a team that has a healer? At the end of the day is simple: "1 mistake may kill the DPSes easily, healing teams may get away with some suboptimal moves more likely".
source of blue quotation: http://www.mmo-champion.com/content/
i.e. I like it, but it will make whatever is being healed even more unkillable against setups with no healers.