I'm personally immensely salty that people actually think the Brummbar got overnerfed.
It is more or less the hole situation. Mostly why some units get changed and some not.
Edit: the patch-notes are good, but I am not a fan of that change.
I am full with the range nerf or the armor nerf. But that only works well if counterparts also get changes.
-We still have spongy tank-hunters.
-Ostwind still is useless
-HMG42 and most MGs still arrives too early. (that is my opinion, early game shouldn't be so MG-heavy the first 120sec)
-Elefant, Jagdtiger, ISU still are too dominant. The damage-nerf was good, but not good enough.
-etc.
That is why Brummbär is overnerfed, mostly because it got touched but not the rest.
Edit: I am still for remove the Brummbär and change it with StuG E.