The APHE nerv would not affect the importance of the knowledge of weakspots, it would just make is less broken.
The only reason the T20 is at 6.3 is, it can oneshot any tank by just hitting the weakspot. Is it fair against a Heavy? No. Cause he can have as much armor as he like, i will still oneshot him. Therefore rendering his armor useless.
Ofc BRs would be shuffeled again, but heavys dont go up, everythink else, that is not a heavy and just at that BR cause of the way APHE works, would go lower… so excaktly the opposide of what u think.
Also it would increase the Survivability of almost any tank as an extra, which is not necessesary a bad think, as turret hits would be in general much less lethal, meaning that also light/medium tanks would start to survive more. Its a general change of APHE, for any tank fighting with and against it. Its just also improving the Heavy tank issue we have right now, that u can ignore all armor by just knowing the weakspots, making “skilled” players, as u call it, much much stonger just because APHE is not as it should be.
And i totaly understand that u fear some tanks will be crap afterwards, but as every tank has a benefit of that change i dont belive that.
Also i know my T20/T34-85, and so on, will be much harder to play against Heavy tanks like IS-2 or Tiger 1 after such a change, i still would like that, as it is just unfair that i can just roam around the battlefield and kill anythink, including these heavy tanks by just shooting their weakspot or sides of turrets. If chaned that would need me to shoot at least twice, weakspots would still work, just wont kill the entire tank in the first hit.
So for me, i would have liked it, even though it would have made the game less easy for me in my mediums. Right now it often just feels unfair to be able to oneshot enemy tanks by hitting locations that should not allow oneshots, not only on heavys.