To be honest, outside of a couple of bosses I didn't find anything to be a problem in the end. I have some optional bosses in the hidden areas to do but outside of that all of the story bosses apart from two were fine for me. With one of them it turned out I was very underleveled.I’m not experiencing any difficulty issues that other people are experiencing. I’ve spent a good amount of time exploring, though, which has allowed me to get to Shadow Realm Blessing level 8. Everyone is using this new feature to increase their power, right? So far the difficulty feels like a pretty natural continuation from the endgame areas of the main game.
I didn't have many Scadutree blessings initially which was part of the problem but I've been collecting more since. Currently level 18.