The character customization is also absolutely awful in GTA Online, the character models look awful, you can't edit them, there is no body customisation, very restricted facial customisation, a really irritating system where the presets drastically change what your character looks like, and you can't stop a characters skin from looking all splotched and gross. It's a challenge to make a character that isn't ugly, and being unable to change them and having your progression tied to a single character is really stupid. Plus the open world is this stupidly sparse wasteland in multiplayer, all the detail from singleplayer is removed.
My fondest memories of Saints Row 3/4 was driving through the neon lights, with excellent music playing on the radio, with my personalised custom character, immersing myself in the world. I want ways to become attached to the world and make my character unique.
My dream sequel would have some limited roleplaying customisation to affect my characters personality. One of my biggest gripes with Saints Row (I never got to play 2, a remaster would be welcome), was how my character was funnelled into this irritating archetype that I felt removed my agency. On one hand, you have this awesome badass voiced by Laura Bailey, but then the game forces them to act like an idiot for cheap laughs, and get smugly talked down to by all their friends. If you are trying to let the characters be personal, I value intelligence, and would like some ways to control my characters personality, as limited as it may be. Romance might be interesting if they do more with that than cheap jokes, that might allow some player choice, although obviously that stuff could suck depending on writing.
I do think that the games could have good (and importantly, challenging) combat as well. I value intelligent AI, in both friendly and enemy encounters, I feel that is really important in fleshing out a game. I love that they don't use cover systems, and instead revolve around constant movement. I would like a game that isn't superpowered, but has action film sensibilities, so epic leaps, dodging, rolls, breaking through glass, badass takedowns, sliding down buildings, and most importantly, a sense of challenge and tough enemies. I have already talked about how important I think pedestrians are too, allowing the player to interact with them (or mundane open world activities) are a great way to live in and immerse yourself in a world, and roleplay your character! Gasp! It would be freaking incredible if your character was changed and had unique dialogue with others depending on activities you do. Yoga, your sexuality, hobbies of any sort, if your interactions as a player in the world subtly changed your character and how your companions react to you (and you to them), that would blow my mind.
The biggest problem open worlds have today is a checklist of repetitive tasks, instead of unique fun side content the player actively wants to seek out and play. Side activities with depth, challenge and replayability, and a focus on detail, rather than scope or size in the game or open world, are crucially important.
I would still love to try AOM, so I really hope it is being optimised (or if Denuvo is dropping performance, having that removed eventually, since the damage is already done).