If one already knows the screen_name of the account for which you're requesting authorization, it will be really great if:
1) One can send the screen_name along with the redirect. 2) Then Twitter can automatically log the person out if he is not logged into the target account, and he's then presented with the must- login version of the form. I'm just thinking about avoiding potential confusion in the user base, when they are sent from an app with the intention of granting access to @abcde, but they get the auth page where they are already logged into their @vwxyz account. Of course, if you don't already know the screen_name, then the way it currently works is fine, because then the target account is a mystery to everyone except the user at that point in time.
