We do have already a red-cross in CEs for Medics. Do you mean replacing it with a ground circle so Medic stands in one position without moving to let the players who need to get healed go to that spot, and adding it at riots and ARs as well? If that's the essence, then I'm certainly in favor of this due to the fact that we're chasing that cross to get healed which is risky too, we might get defeated while we focus on getting healed rather than fighting.
Didn't know red cross is a thing in CEs, it can also be like that outside, or we could have the circle if the the cross blocks the view.