"just hp boost" was also applied to M10, StuG, sherman EZ8, KV-2, ost weapon teams(4th man), Stuart, 222 previously(apparently only allies are supposed to be losing less then 20fu units to mines and axis vehicles are all supposed to be able to crawl away if they can).
Do I need to remind anyone old 2% hp bulletins and their effect on balance?
The "just hp boost" is one of the most powerful buffs a unit can get.
"Just hp boost" can take unit from being completely and utterly useless to meta and always go-to unit.
It still can take damage from just about EVERYTHING, so an HP boost was necessary. At least now the 222 doesn't die immediately after being spotted by any sort of AT.