I think I saw this on Reddit as well!

Defibrilator is a no brainer in case they decide to give a rez to the MCH. I wonder how much battery it would cost... probably something that represented a similar dps loss to a SMN hardcasting a Raise or not Swiftcasting Slipstreaam on their rotation.

I always pictured that one direction they could expand upon for 7.0 i giving Heat Blast a combo sequence, and the Rocket Launcher idea seems perfect for the finishing stage of the combo!

One thing that I thought it could be an unique utility for MCH is a "Medkit". 120s recast time, it gives a small heal but also cuts 20 second of the Brink of Death debuff, letting you or an ally get back to their feet faster.