I have not. I'm currently in the middle of act 3 in honor mode on one playthrough and middle of act 2 in another on tactician because I want to try something in tactician before I try it in honor so I don't bork my honor mode save. But I've beaten the game multiple times on tactician now and have about 620 hours in game.
They are definitely modifying the dice rolls in some way in tactician and honor modes. You can see it in things like ability checks. Normally you'll have a chance to roll well for any roll even if you don't have proficiency in the skill, for example a 15 CHA dialog check and you have 8 CHA, if you roll a 16+ you'll pass it. On tactician and honor mode if you don't have proficiency you'll struggle to pass the check, all your rolls will be under 5 usually. I've burned 4 inspirations with advantage before and watched 8 dice rolls under 5 for a skill check I wasn't proficient in multiple times in a run. I just ignore it now since it is what it is but I really wish the difficulty wasn't rigged like that. It'd be great to have a fair but brutal mode.
I have not. I'm currently in the middle of act 3 in honor mode on one playthrough and middle of act 2 in another on tactician because I want to try something in tactician before I try it in honor so I don't bork my honor mode save. But I've beaten the game multiple times on tactician now and have about 620 hours in game.