Umm, in CiV the medic promotion was fine. Wasn't the best promotion, but wasn't worthless either. 3 fortified units with a medic nearby made for a very, very hard wall to crack.
I fully agree with you. In Civ5, it was "fine", "not the best promotion", and indeed you could set up a few fortified units that would be really hard to kill.
But this time around the "Medic" is a unit on its own that you have to
produce, and walk to your army. And i think it's a brilliant idea But in my view, these added constraints would justify a stronger version of the promotion (that is now a walking unit).
Also, in Civ5 there used to be a another stronger heal promotion that would heal the unit each turn, no matter what. In Civ6 I have seen that on the Arabian Cavalry so far. So the "Medic" Support Unit could have been designed as such as well, don't you think ?
In the end my point is, no matter the connection we make between the name of the "Medic" unit in Civ6 and the promotion "Medic" in Civ5, I honestly feel it is very useless as it is currently.
I defy anyone to claim they took an enemy town thanks to that clutch heal provided by that well placed Medic.
Please change my mind if you can because I love the concept of splitting the promotions into fully fledged units and I think they executed it flawlessly with the Observation Balloon.