I don’t see any reason to change it back. Zubeknov has a nice niche. Higher ROF, lower Damage, overall higher DPS. I enjoy it, and the higher ROF coupled with recoil keeps it balanced. Theres nothing wrong with it at all.
If anything the “PRE-RUSSIA” zubek was a bit unbalanced, as its recoil was the same, yet slower ROF (therefore recoil easier to manage) and then higher damage? More shots landed, more damage dealt. Compared to the one was have now, more shots fired, less damage dealt. It takes a bit more skill to land all or most of your shots, and costs more to upkeep ammo-wise.