I just wish their mechanics and structure of mechanics weren't so convaluted. Like the boss raises his right fist and starts casting "big hit," you see the marker, and you dodge it. But then they have the boss lift their fist and have no marker. It still casts "Big hit," but the player doesn't get the same marker structure and dies. Because the marker popped up at the very last second, and they can't dodge it. Now, the simple solution is to focus the boss and watch the cast/boss, but the majority of people aren't going to do that and die. Or the mechanics straight up has no telegraph happens for a minute straight requires you to memorize it and you die to it. I just wish we got more common sense mechanics even if the only solution to making them harder is making them faster.
But I'm a casual. When I do content, I like to learn that stuff and not spoil it with a video. Understandably, people don't want to waste their time. So if we need harder solo content, maybe. I'm not sure, but what I can say is that the current system sucks. It not fun, and it leaves me playing the game less and less as time goes on.