L2P bro.
If you can't handle microing and you lose squad in garrison it's L2P. It's not like FHT insta kills without any chances to react.
Which is a lie. You only have a chance to react if
a) Your hmg if above 75% of health.
b) your camera is actually screening the action. You could be managing anything else around for a couple of seconds making any action to save your squad too late.
Not saying 251FT is OP, but it is definitively too much punishing if you didn't see it coming.
The OP is clearly right when he mentions that many light units absolutely not OP right now are getting nerfed for the sake of an invisible balance, something we'll never see (aka are M20/M15 balance in this patch without being nerfed). Patch dev's took the decision to balance light vehicles from the bottom but leave one of them untouched, one that can, in some specific condition, specific maps, wipe entire units in much less time that you actually think.
I played Coh2 since years now and I actually probably manage to vet3 a M15 once or twice (thanks to the planes). A m20 vet3 is something super rare but a 251ft vet3, I consider myself playing really badly or doing something stupid with my 251 if I lost it before it reach vet3 today.