Yeah...

In my opinion, MCH need 1 more utility to be on par with BRD as a supporter. It's vuln debuff is pretty strong because of its huge uptime and it can reduce boss damage on spot... So, maybe a party buff focused utility. I wouldn't mind a 3min recast time Healing Turret that would moderately heal people for about 15s, or hypercharge for a bursty mass heal.

This would give MCHs nice on-demand save for when your healers are short on mana. You wouldn't get that big save every 3min because that would mean sacrificing your dps turrets hypercharges