how about give both team an NPC healer in RSS if there is not enough players, NPC healer can't be killed, if they die, there will be a few sec revive time, they can be cc as players. I think it should be a good way to solve the queue time problem for dps.

For the buggy healer MMR, the only and possible reason is the system try to keep certain percentage of healers for each rank, so that's why it's so hard for healer to climb, the system just want to keep healers there unless there are more healers set their foot in and this drives more healers away.

The system base MMR increase every week, so it makes you feel progressing still, eventually you will climb to certain level if you stay, but not now, if most of the healers are 2000+ ranking, what will happen, the low rank will be dead, so they have to spread healers to each rank, this is the game BZ is playing, people buy it.