I’m having a great time too. I was apprehensive before the release as I was worried all the changes might make the game too difficult for me but that hasn’t been the case at all… part of that may be the spiritborn being so strong though!
Weirdly I’ve found the opposite to you in that I think I’ve levelled up faster this season than usual but I think that’s just because I’ve gotten better and more used to the game, I only really started playing in season 4. I didn’t start playing the new season until Wednesday and I’ve only played evenings after work and I’ve made my way to torment 3 already.
Haven’t tried the citadel yet, thought I’d wait until I have a really decent build together first.