for reasons that may be obvious, I have had to go back and change password and userids where possible for many sites. the lastpass client user experience helps in some ways (e.g. generate strong password is useful) but can be a bit frustrating and tedious for a big task such as this.
I have started to lose track of which sites I have already updated.
one can sort by most recently used, but it would be good to be able to see when the account info for an entry was last changed.