Really I thought it was fairly similar to tempered teostra or so. The new moves aren't so bad and overall it's fairly similar in the sense that if you don't get chain flinches and knock downs, he can get pretty feisty, but fire mantle still makes the fight a ton easier. The biggest "buff" he got is that I didn't have health augments yet so healing the constant shitty damage was a pain.
The one I was pretty surprised about was Kirin. He got a lot of buffs on his normal moves, actually carted me 3 times before I stopped trying to counter lightnings like an idiot and just held block/power guard because everything is multihits now almost, that or he does a long cast with a short cast randomly happening just before(so you counter the short and get hit by long). Once I got used to the new stuff though he was just as easy as before, low hp and high chance to knock down.
Lunastra is also in theory real stupid but haven't fought her yet.