Thing is, all TDs right right now have pretty much 100% chance of penetration against mediums and at the same time all non-premium mediums have relatively same pefromance vs heavy tanks, in other words T34\76 is garbo against heavies, but so is PIV.
And in the end if Axis really need something to fight KVs\IS\ISU and churchills they do need to get panthers, which is second the most expensive non-doc vehicle in the game and more over it requares agressive hit-n-run play.
To put it to put it bluntly, jackson\SU-85\Firefly was buffed to fight heavies, snowballing into the fact that they are effective against litteraly any armored unit, while Axis TDs were left at the same level of old allied TDs.
Patch after patch, Soviet and UKF heavy play become very common aswell as timings were shifted.
Also speaking about stock panther, at least panther has 90 rear armor, meaning that as long as anything hits it in the butt it will take damage. Even T34\76 would have 100% chance of rear armor penetration at max distance.
But still this is uttely idiotic, that all heavies rear armor is almost completly immune against mediums.
you wont finmd any disagreement from me. ive been on the side of that needing been changed for a long long time, and i was a very loud voice in the su85 getting changed in the first place
ive suggested changes of my own including lowering dedicated TD pen but granting deflection damage or widening the range of armour/pen so that fine tuning can be made and supporting others suggestions like cranking medium tank close range pen so that they can be useable against heavy tanks or lowering heavy rear armour all in name of better balance.
however we look at it though allies NEED a stock heavy TD because they are facing very durable armour guaranteed when fighting axis. the panther being expensive imo isnt so much an issue because its either going to be fighting meatshields that while cheaper lack the bite to be a huge threat or proper heavies that are more expensive at which point the panther is cost efficient.