It requires manpower, micro investment (both for timed aura and manual healing) and 3 pop of dead weight for a faction that already has good healing options (medkit Sections / Forward Assembly).
It's a worst of both worlds solution. The medic squad is awkward for doing what it's actually meant to and it opens up several cans of bizarre cheese.
I honestly can't see any benefit to this approach over just spawning some base automatrons like Soviet. If you want it to be weak healing, just spawn fewer of them.