Can someone with access to it let us know whether they've undone what I consider iTunes 11's biggest stupidity, in which the Up Next's list INSISTS on filling itself with random stuff I don't ask for when I just want to listen to one album?
I probably shouldn't jump in on this, and I'm not trying to be condescending or rude, either, but I have absolutely no idea what you're talking about. Since when does the Up Next feature add anything by itself? I add music manually, and whatever I add is all there is in Up Next. Does Up Next really autofill for you (and others on here who haven't argued with your main premise)??
In any case, you know you can add entire albums to Up Next at once, right? Even multiple albums at once (just right click on them in albums view, or anywhere else, as far as I know). And they should play in the order you add them, unshuffled.
Sorry that's probably not helpful at all (I'm sure you already knew it), but I've never seen this autofill functionality or had any problems and I simply can't fathom what you're talking about.