For bugs especially you need to bump the difficulty up to AT LEAST Impossible now for things to even feel threatening with a moderately high leveled team. A group of four of us around level 80 went through hard and Suicide with almost 0 deaths on our first attempts after these "patches." We did a run through one set for bots too and it definitely feels different.
Level 50 was the original maximum. You've completed the game. Presumably by now you've unlocked everything, of course it's easier. Try starting from level 1 again and see how you feel.