Getting straight to the point: my playtime is about 250 hours for now (EA and release). I tried playing both in standard and karmic mode. My general feeling is as such:
Standard dice mode: everyone misses nearly all the time, spell slots mostly get wasted, encounters drag on forever. Prone to streaks and confirmation bias.
I'm speechless. In 200 hours of playtime shouldn't you have learnt something essential within the game mechanics other than trusting 55% odds to hit?
In Act 3, you rarely missed. With 10-13 proficiency bonus (on my rogue) I'm stabbing Gods themselves in the back until it is dead - this is in allegedly "easy" tactician difficulty (which is still hard, you just need to pay attention).
Larian maybe need to optimize the difficulty but 200 hours plus in game should've made you practically an expert handling enemies.