I played Tactician pretty extensively last night and I was extremely annoyed at the amount of savescumming I had to do because of lucky enemy rolls resulting in a near-unavoidable wipe.
I'm 100% fine with a difficulty level that defeats me through intelligence and tactical options, but stat bloat is just irritating. It makes you feel like your attacks are all weak unless you eschew all of your particular character preferences to favor whatever meta is currently touted by the number-crunchers.
In short, Classical is slightly too easy but Tactical is heavy-handedly unbalanced unless you really, really push towards meta play and stacked, nonfluid encounters.