Like for example insisting that the game as designed (by both Paizo to Owlcat) is set up so that you don't need to munchkinize even for higher level play, and that most single classes are good, and even the companions are built well, if you look for and rely more on team synergies - is that true? I don't know, but it's one of many interesting things he said.
I can only speak for Kingmaker, but for that game I 100% agree with both points. I haven't played a class in Kingmaker that is bad, but then I haven't played all of them. Oddly enough the classes I've heard shit talked the most on YouTube and Reddit are actually some of the strongest. Like the sword saint and the rogue. It's a very flexible system and people "optimize" in idiosyncratic ways. I can't fathom why so many people say to make Valerie a bard. Is that just a meme? She's clearly statted to be a tank/intimidate build.
As for the companions (in Kingmaker), they are all reasonably built for a party based game. In my recent modded ironman attempt my biggest struggle was how the mod author respecced the companions. It was interesting, but it made the game a lot harder and I don't think it was just because I was unused to their classes. They were all built like main characters, not team members. The default party has really good coverage of skills and roles, and it's easy to put together a really strong group without needing to rely on mercenaries. They aren't minmaxed, but they are very reasonably statted for their classes. Not having a 20 in their main stat isn't the deal breaker people act like it is. From the mid game onward Kingmaker makes it rain with stat boosting loot, so they all get the job done very well if you don't only buy good stuff for your main.
That was my biggest gripe about CoTW, and its why the ironman run I'm playing currently doesn't use that mod (the LP will start when I get my barony).
Desiderius was just a fanboy. Fanboys sometimes get too riled up about their precious things.
Yeah he should have got that tag, not a banning. All the beta testers should have for not warning us.