I have been playing some games on the patch, with mates around rank 100 in 2v2, so good players but I don't know how top players handle the patch.
About the changes:
1) The Heavy tank meta
I think the changes are ineffective : CP is an irrelevant changes, since you have the tech and ressources to get the heavy tank around 11-12 CPs.
Recharges change isn't good as well, since most players keep their heavy tanks a bit longer, or if it's destroyied, they don't have enough resources to get it back immediatly.
"Require all tech building". I honestly don't know, because at the moment, heavy tanks are (in most cases) part of the game where either : you take advantage of resources advantages, or it's a comeback tool. requiring all tech would impact the comeback tool, but i'm not sure yet.
2) Brits Changes
Pyro smokes is a great idea : A few ammo, to push weapon teams and hide lines of sight. not expansive, limited range : a good and balanced change.
Medic squad is a good one too. before, you needed a HQ in the basee with an upgrade so 200 MP and 60 ammo to have meds in base. now it's a 180 MP squad, that can distribute meds supplies for 3 seconds, available from T0. good change again.
Airlanding officer is a unit i never went for, and i didn't try it out yet so can't give an opinion.
3) Soviet changes
removing the 7 man conscript squad bonus makes Soviets suffer in the late game infantry play against OKW even more than now. However, Airborne guards is a good change with a strafe that can support effectively.
I still think that, when choosing this commander, getting SVTs rifle on Conscript is worth more than getting 7 man squads, because it's cheaper and comes earlier. given a snare without PTRS rifles, it's a more solid solution than Penals. SVTs rifles could be a non doctrinal upgrade tied to T3 or 4.
4) USF changes
Not much to say, but cluster bombs change isn't a good one, since the plane still looks like a Star Wars space ship jumping into HyperSpace : The delay changes isn't effective enough. depends on where the planes come from too
5) OKW changes
Problem is well known. Falls are the best infantry unit in the game, can counter everything, can cloack etc.... removing panzerfaust is a good step, but elite infantry costing the same as Obers at 2 CP, that can paradrop and cloack ambush? definitely a no. Falls is elite infantry and should be tied to t4 as Obers are. Locking the upgrade at T4 isn't effective enough.
Halftrack changes are a good idea : a cheap spotting ability, cannot hide as much anymore.
Sorry for long post, hope it helps the balance team