I must agree as a company Helpdesk admin, that it is much easier for the user to simply click on an email link and get started. Adobe is saying "but you don't need to do that, the user already has rights." What Adobe does not seem to be getting here is that it is easier for the admin and the user to use the invitation method. This should be about making things easier for the customer. Where does a user go that has a fresh PC? Lets see...Google Adobe CC login....find many results....maybe this one will work. Will the login even work..... etc..., etc...
People just want things SIMPLE.....We have work to do. Resend link...user click...DONE.
PS- I do love the new admin panel Adobe...Kudos on that. At least you didn't say...We don't need a new admin panel all your licenses are still there even if you cannot find them or organize them.....You don't need a new admin panel...the licenses are already there.