UA is one of those albums that just kinda gets forgotten. I think it was a step up from System Has Failed (not sayin a ton though) but I think it pails to Endgame and is mostly a lost album. I'll still listen to a few songs from it every now and then.
I think it's also how 13 will be viewed several years from now as well. Not really good, not really bad, just kind of blends in w/ the furniture.