In general, I find the combat more difficult, though there's a bit of a weird curve. I found level 1-2 pretty tough, but by 3-4, I beat a bunch of fights (including taking on a bunch of magisters) really quite easily. But I have to say I'm finding the void dragon and the Radeka fights really hard to where I can't beat them, though I suppose I'm underleveled. But I'm glad I'm having a tough time and I feel like I have to level up and get better gear to beat them. And it's not necessarily just a numbers gain, but a matter of strategy and gaining the proper skills to deal with them.
So overall, combat difficulty feels pretty solid for classical difficulty. But if Tactical difficulty is markedly harder, it's going to be quite something.
I do have a general issue, where combat can feel really chaotic with the elements constantly causing explosions and stun clouds and smoke and cursed surfaces and crazy stuff. Obviously this is part of the appeal of the combat, but sometimes it feels excessive, and I wonder "wait, why am I stunned all of the sudden?" Part of the difficulty is acclimating to the interactions, but sometimes I wonder if a few indications of how an attack will effect a situation wouldn't hurt too much. There can be so much going on that it's hard to see that tiny pool of blood connecting to the water that will end up stunning my tank. Sometimes, even if I see the blood, it's hard to tell if the enemy is close enough to it that air damage will electrify the blood.
In short, maybe the readability of the battlefield could use some work. I dunno. Just some impressions.