I'm honestly okay with the 8 personalities they have. I like so many villagers that 10 spots already doesn't feel like enough for the 8 personalities they have. If they add any more personalities, I personally feel like they'd need to up the spots to 15 (which I wish they would do anyway). I know some said they feel like they have no room on their island for 5 more villager houses but I have plenty of room on my island and feel like there's so much extra space? I'd honestly really like them to fill out existing personalities to have more diversity/variation rather than add new personality types. I'd be fine with having extra villagers of the same personality if they didn't have so much repeat dialogue.