People will just use next best weapons and talents, like combat axes, powers swords, force swords, relic blade, bolter, voidblast staff, and right here on this forum we will get another wave of whining about nerfing every new meta.
Ogryn goes back to oblivion, it was a rare, compared to other classes, to see him in games before rework, people outright refused to take ogryn players into havoc(Havoc and Ogryns! :: Warhammer 40,000: Darktide The Mourningstar - General Discussions).
And games will be longer, now that everyone do way less damage,back off more, because less protected.