Unpopular opinion, but I think the nerfing is good. I just finished the campaign and it was a little too easy, never really a challenge except some bosses that I just need to run around until I have enough essence, hit them and repeat... I just walk around sanctuary and destroy all mobs with one or two blood surges and then keep going.

To be fair, if it was harder, then I'd have given up on the campaign because it's so long