Larian has taken an unusual approach to its new Honour Mode difficulty in BG3 Patch 5. It buffs bosses by giving them new abilities and fixes a lot of exploits. The problem is that it's coupled with Ironman, although if you die the game reverts to Tactician difficulty. You can't play with the enhanced bosses and fixes without Ironman, which is quite irritating.
I think the root of the problem is that these 'exploits' are so commonplace that players have been taking advantage of them without necessarily meaning to. They've practically become features rather than bugs. Fixing them has a very significant impact on the game's difficulty and wrecks a lot of builds. I guess Larian was worried about the backlash they'd get if they broadly imposed the fixes, so have decided to lock them behind this new hardest difficulty. I'm hoping that they'll give the option to enable Honour mode difficulty options without Ironman. Or that some modder will fix it.