Honestly, the ideal scenario would be:

- Conversations always default to PC (Since, that's who you're playing as so that's where your point of view is)

- Conversations always have all party members dialogue options (Whenever I'm with a group of friends, any one of us can speak up at any time...)

- Skill checks default to whomever has the best rolls (Ties can just pick one person randomly) unless it's a character specific option (So no having your Sorcerer roll for your Barbarian's Intimidate option)

- For multiplayer, use the KotR system where everyone picks something and then an option is randomly chosen from what was picked.

- In open world, whenever a character gets in range of a skill check, everyone rolls for it (This happens in some places like that cave on the beach with the harper stash in Act 1 where everyone rolls a Nature check when someone gets into range of it)

- Selecting to Disarm or Lockpick something, will send the character with the best stats to do so from the currently selected members (This is something that Pillars does...)

- Allow for formations. So that it can be possible to put front lines characters in the front lines, so if a fight breaks out your party is in a not stupid position (Far too often the games pathing puts my weak squishy ranged characters up front and my front lines so far back that they have to Dash in order to get anywhere near something they can attack...)

It's baffling how bass ackwards the overall systems are.