There are some battles that are not trivial, mostly at lower levels, where you are not geared up like crazy. Main problem is, the encounter design leans heavily towards single target burst damage and you have many many ways to do exactly that. A bardadin around level 5 is, even without min maxing and without haste, almost instoppable and that is probably not the most broken build in the game. To make tactician actually tactical Larian needs to change the encounters in such a way, that positioning, crowd control, buffs and debuffs become relevant. And the AI needs to act a little bit less dumb.