I know main focus is solo story I do think an event or some missions for multiplayer would be fire to have. Not a lot of gacha games focus on multiplayer and it's quite boring running around alone for 90% of the game while you just have sit there watch your friends do puzzles. It'd be nice if you can help your friends and interact with there map properly. Also like add please don't add escort missions I can't stress this enough that it's not fun and is just time consuming to take an AI running around a map doing miniscule tasks that have no purpose. These are just my opinion's but I do find open world games to be a lot more fun with friends then just standing around doing nothing.