piats should be a bit like that because of history (let's not make them better than shrecks or bazookas) and, more importantly, because of many snares/AT solutions ukf have (sniper, aec, a very fast moving AT gun plus stock heavy build-able stationary AT gun). Basically they got snares and their original design was to rely on sniper, aec, tulips with firefly and mines. Also on the fact that any unit can just grab AT weapons. Any buffs to piats should be connected with nerfing those other AT options left after original game design imo.
I like the way you try to use history as an argument to keep allied stuff weak, but ignore the part where axis had unsustainable army.
Or the way you list all UKF gimmicks they relied on in the past, while conveniently ignoring the fact they are all completely impotent nowadays to the point where faction could not even function properly anymore without getting actual AT nade.
No one is asking to buff piats here, they are fine as they are and so are shrecks.
And piats still are used extremely rarely, because they are pointless in most situations.