Can't tell you how many calls/ emails I've received from our user base saying "I see that Omniture re-designed their site... it looks nice, but I can't find the reports I usually run"... that's when I know they've fallen into the 13.5 trap.
Omniture - please give us the ability to select the default version for our company. Or at least make v14 the default for everyone, instead of 13.5.