Honestly, I think my only dislike thus far (aside from the many bugs still riddling it... Daeran is taking a permanent -5 damage which immediately heals back due to a bug with Life Link, and I'm having weird 13% area loading hangups when weather is going on in the area), is the Crusade Mode.
It just feels... bad. There's little strategy to manual fighting besides brute forcing and hoping for the best, with a few skills available from unit types or the general; you lose numbers faster than you can replenish them; strength levels are completely imbalanced, with a level 1 unit somehow able to mow your higher numbers down easily. I was consistently having trouble with advancing and clearing areas to the point I gave up on it and put the whole thing on Auto - which I now can't take back, a decision that seems excessively punishing considering some Mythic paths have quests related to the Crusade Mode later.
It's just not a good addition, and it being so integral to advancing the story and allowing you access to more areas just feels pretty awful because of how badly it's built.
You should give them this feedback. Even though the game is now in final release, they will surely be continuing to fix it for some months to come. One of the best characteristics of Owlcat is their strong work ethic and willingness to keep on improving their game for a long time.
