Hey
Is OOO135 compatible with Oblivion Character Overhaul v2?
Is OCO going to change the stats of npc and make OOO easier? I don't want that.
I just installed the recent OOO version with OCO and I think that when I played the older version of OOO it was a bit harder. Is it because OCO?

OCO overrides NPC stats since BOSS places it later than OOO in loadorder, use Wrye Bash's Bashed Patch to fix that.