There are some occasional unexpected difficulty spikes, but overall, yeah, it's pretty normal.
That's really unfortunate - the game became too easy to be fun (I straight up started skipping turns with some characters just to have Cassia spam lidless eye and clear the board, ggwp). I guess I'll wait for the expansions to come out and hope the game gets a balance pass by then
I think this is the worst thing about Cassia-level imba in a single player game. One can understand the pursuit of refined balance in PvP, but one sometimes wonders why is it necessary in PvE? I think this is the answer. Essentially if some entity or combination is out of whack with everything else to such a degree then, human nature being what it is, everyone uses it, so the game becomes boring for everyone.
Whereas if every ability and item does what it says on the tin and is effective to a roughly similar level, you have more of a potential spread of different, fun playstyles.
(Note
Owlcat_Eyler: just take Cassia's powers out of availability at every level-up, treat her navigator powers like every other class' equivalent-power-level abilities, have them available only every few levels instead of every level. I've no idea why they made her abilities so powerful and synergistic AND made them available at nearly every level up! )