it would be nice to login with username and password (and maybe do something with our email when you have a bug, so we can fix the bug ourselves).
i had to install ios on my phone and then my account is lost. so everytime i update or reset my phone, my account will be lost. with a login you can provide this bug. caus i and i gues other people too, dont wanna wait a month everytime we change our phones software. this should be your biggest issue, it causes you guys alot of work that isnt needed.