The ostheer type stop gap tier seems to be a solution now, but lets not forget what caused the problem in the first place. And that was the huge increase in cost of tier 3 in all factions aimed to lenghten the LV play. What it really did was cause problems with LVs like T70 and luchs that had to be nerfed in order to keep them ballanced. But they were completely fine before that! And so were the mediums. Yes, shermans did arrive quicker than they do now. But so did stugs that countered them. And because they arrived so quickly, there was a point for them to be in top tier, because even though meds were in the same tier as late game units, they arrived at the time when building late game unit would be simply a mistake. That is how it was ballanced out before.
To sum up, I have a strong feeling that all of this is just trying to change everything in the game to ballance around the fact that a huge mistake has been made and devs don't want to admit that and revert that change. I mean, I know this process is halfway done, yet I think it is important thing to be aware of.
10mins shermans were not healthy for the game. It was also a completely different meta game at that moment and different tech structure. It was not just delaying mediums.
Soviets having to choose from either T1 into T4 or T2 into T3 if you were not skipping for call in tanks. T70 was completely busted, same with first versions of FHT. But that was the case because they had to win you the game or basically wipe squads in the 2/3 minute window they had. After that it was medium/heavy call in spam with engineers.
Luch was not fine, it was part of T4 and never used. OKW didn't had stock PIV and relied more in schreck spam into vet 5 and OP shit like KT. Kubel had suppression and Flak HT had attack ground splash suppression (if you went for mechanized).
USF rushed LT into M20 into Sherman. OH was cannabalized specially in 1v1 where you DIDN'T had a chance in getting a Stug with all the pressure Elite rifleman with flamers had.
Game was not balanced during WFA. Either you played meta or you lost badly. OKW was not balanced for teamgames, USF was not balanced for 1v1 or specially against OH, and maxim spam in 1v1 against OKW.