Having beaten the game on tactician with a solo tavern brawler barbarian, I agree (I say beaten, but it got too easy so I kinda lost interest halfway through act 3).
I had to install a +80% health and +4 to all attacks and such mod to make it remotely challenging. And even then I didn't have to try particularly hard. I want to have to use potions, scrolls, tactics and tickle out every last advantage.
"But you could just not play optimally and just enjoy the game!" - well, I do! I absolutely love all aspects of the game to bits, but I also really enjoy the puzzle solving part, which means finding all the best build and gear combinations and using elixirs. And the more I play, the more that becomes the most enjoyable part. So please Larian, let me enjoy many more playthroughs by adding an absolutely ridiculously broken, near impossible difficulty. You're the best.