The hardest difficulty mode should require meta gaming. It's not fun to have to limit oneself in order to make things more difficult. I want to suffer through the hardest challenge and only make it through due to the most optimal build and clever strategies possible. Sometimes that should even require picking up certain classes/abilities just to be able to compete against the boss's mechanic. This tests player knowledge and gives a great sense of accomplishment, all while encouraging the use of more than 4 non-rotating party members.

To clarify, I love the addition of honor mode, and I think Larian has done an absolutely fantastic job with it and the other added content so far. It certainly adds a great load of spice to this already incredibly replayable game, not to mention the well-needed balancing changes for some broken mechanics it brings with it. That being said, I do have some small comments.

Players going through honor mode now have probably already beaten the game at least once if not even more times. Having the new boss mechanics is a lot of fun, but they still don't disrupt the already optimal strategy in the normal modes. If anything, I only got close to wiping on my first playthrough on trash. During the inquisitor fight, the one time the legendary action mechanic seemed dangerous, they provide a scroll of globe of invulnerability right before, nullifying any risk of wiping and trivializing the fight.

This worsens late game, as bosses do not scale whatsoever with the power of an optimally built party. This is a frequent issue of Larian games, but I feel legendary actions are poised perfectly to nullify this issue without turning bosses into uninteresting damage sponges. The issue for now is that bosses late game do not have legendary effects that have any real impact or force optimally built characters to play around them. Most simply play off of the boss's current strengths rather than reinforcing their weakpoints.

To begin, I will give an example of how legendary actions can create a new mechanic to nullify a previous optimal strategy to a fight, that example being the Nere fight. Normally, I rush Nere down and kill him within the first turn. However, during my honor run, I noticed his punishing ability that not only increased his survivability but also retaliated against attacks. Because of this, I changed my strategy to one of picking off the supporting Duergar before finally finishing off Nere. (Balthazar is a worthy example too, but, following much worry, I shockingly totally steamrolled him by targeting him despite the mechanic after accidentally prematurely starting a fight)

Nere's legendary mechanic accomplished 2 goals. For one, it made Nere a more menacing opponent and forced me to create a new strategy, and for two, it added a layer of replayability to honor mode for the player who has already played through normal BG3 and knows its challenges all too well. Unfortunately, most other fights do not do this. Instead, they just add layers onto an existing strength of the boss (meaning that the strategy to beat them is exactly the same). I will list some examples of this below:

Ketheric Thorm: Legendary action reinforces existing strategy to pick off the necromites and then defeat Ketheric
Raphael: Legendary action reinforces existing strategy to target Raphael last/control Raphael until he's the last one left and all pillars are destroyed
Viconia: Legendary action reinforces existing mechanic of punishing those who have been heartmapped (it does nothing if you do not let her exploit that mechanic, leaving the fight essentially the same)
Gortash: Legendary Mechanic does nothing? I don't even remember what it was; that's how easy the fight was. Mechanic should address the meta of destroying all traps in a room then luring Gortash to the room, i.e. reactivating destroyed traps.

I did not beat all of the bosses in act 3 since I wanted to mitigate risk and get my golden dice, so I can't speak for other bosses. That being said, I think there could be some great tweaks to these legendary actions that really force players to think and add some flavor to the overall honor mode experience. Although it wasn't totally necessary come act 3, I loved having to optimize my strategy and mitigate risk for a one-save run. I can't wait to give honor mode another shot and defeat all the bosses I skipped in act 3 during my first run.