I don't know if this should be a new thread, but, I've been thinking of ways to address this while remaining feasible. I think adding a few features could go a long way to making mp more hassle free, enjoyable and easier to find a group to have FUN with.
1. A looking for group lobby separate from general chat.
2. Maybe a way to signify groups or parties from the last session? Would be fun to have a few games going as well as not "need" to be extremely organized with 3 friends.
3. A rep system. I think this is the most important. Players should be rated, this can help people find like parties. When I first thought of this I didn't want it to be rude like good/poor but more like DnD alignment. Some players might just like being more chaotic than others! Doesn't mean they are a true troll if they are just roleplaying a little more seriously.
Ex...go to mp lobby, find some cool people, their rep "aligns" with what you're looking for and you begin a new game. It goes well and it's easy to see when your party is online again and you invite them for session 2.
I hope Larian checks this out and can come up with a neat way to make mp a little easier.