Well, a few lighting changes are what I'm referring to here, but YWT suffered greatly after Dean last year when the whole show pretty much lost its structure until the HD relaunch. During that time period, the show stopped using pretty much all of its openers, stopped doing the region-by-region look at :00 and :30, and dropped the Travel segment at :10 in favor of fluff. (Travel Destinations)
Basically what happened is that the structure was temporarily taken away for Dean coverage, but they decided to never restore structure after Dean went away.