Yeah, I must agree. My wife and I have actually talked alot about this especially after our last two trips. We're still relatively new to "The World" since we have only been going since April of 2005 but it seems like even back then the selection of merchandise was much better. Do you think it has anything to do with the Year of A Million Dreams celebration? It seems like there was more variety and creativity during the Happiest Celebration On Earth. I seem to remember more attraction specific merchandise just three short years ago. I remember seeing several Space Mountain shirts that I really liked in April of '05 but when I went to look for them a year later they were nowhere to be seen as a matter of fact there weren't any SM shirts at all!
Disney knows that most of thier guests love to spend money on merchandise, the fact that there are a bazillion shops scattered all over property is a testament to this, so you'd think they would pour more time and money into developing more diverse and unique merchandise. My wife and I have bought alot of Disney clothing on Ebay and I am constantly wowed by some of the cool merchandise we find from just a few short years ago, especially the Disneyland stuff. While I'm whining let me say that the mens section at World of Disney is absolutely pathetic, but then again, the men's section at MOST clothing stores is pathetic.
We do most of our shopping at Disneyshopping.com, you can find some amazing deals there and they tend to update thier merchandise quite frequently. Contrary to another posters statement, Disney Store merchandise tends to be exclusive and can't be found in any of the parks and vice versa.
I keep hoping that we will see some new merch rolled out for the second year of YOAMD and for the retheming of of MGM to DHS.