One thing that’s really clunky is checking the list of followers and followed accounts: depending on which instance is each account, these lists are either incomplete or empty. I don’t know if I do something wrong, but I was trying to get up to speed with Mastodon by discovering interesting accounts to follow- which is not trivial - and found the aforementioned problem. I use a third party app and various web front ends, including the “official” ones (you are forced to when you look for the list of followed/followers)