In 1v1s yes, but in 3v3s/4v4s an early forward ambulance to hold one part of the map (with teammates) is incredibly powerful, borderline overpowered even, which is the reason any straight durability buffs were discarded. We looked at the alternative base layout to help protect it, but that was not deemed viable for Relic to implement, and we looked at giving the ambu a lock down mode for main base sectors so it could have increased durability only there, but couldn't find a simple way to do so.
Any way to introduce a feature similar to sWs trucks? Not to suggest that would simple, but take that mechanic and apply it to the ambulance w/ a base sector requirement
I'm also of the opinion that the US base layout is an abomination, so that's always worth changing in my book (easy to say when you're not a modder)