Im too addicted, tbh. I care way too much. It is the most amazing game I've ever played. Anything I post out here suggesting improvements is just because I think there are some things that would make it even more awesome and a bit more true to D&D 5e rules, and to make certain things more believable.
That said, I haven't tried multiplayer with others, but I've experienced some of the functionality of what they are building by creating my own multiplayer session and 4 custom characters. There's a trick you can do to make this work. I have a post about it further down on the list.
Basically, besides having a party of custom characters, your characters actually interact to events in the game with one another. Ive never played a game where that happens. You can choose dialogue options for your character as you talk to the other custom characters, and they do the same. It still needs work, but the basic build is there. I really like it.