Good idea about heal, but I think it goes on the wrong unit.
Firstly - its a bit absurd to go on a pioneer squad , at Vet 1, it repairs people and machines
Secondly - assault units getting this ability is a little bit strong - its a bit like assault, then heal, assault then heal.
It could be better to put this ability on volks at vet 1, which is gettable in earlygame.
The situation you describe won't really happen, because you can't heal in combat, assault troops stay on front drop models and are always in and out in combat. Moreover you want to reinforce your damage squad, healing won't help you in that way.
In addition, abilities like this should not be on on mainline infantry, then they could be really spammable, especially some players tend to get more than 3 volks.
Brit heal is fine ? LOL
You have to rely on a squad to heal all other squad, brits don't have bunkers, hq, ambulance or batllegroup to heal troops, and i'm not talking about the fact the medic squad is doctrinal
If you want to go heavy engineer, you have to keep an IS squad alive, if not you got no heal
So no, brits healing is not fine and you really don't need to copy a shitty ability, keep the ability of sturm, but lower the price to make it viable to skip Med truck
Sounds like a micro issue to me. I have no problem keeping at least one section alive, especially thanks to their vet bonuses. I usually have 3 sections and depending on the map every single has the medic upgrade. Keeping all units healed up.