If you are simulating your toon with each piece, however, there still isn't that much interesting about the gear. It would be a royal pain the rear to have to find the perfect balance at your specific gear breakpoints if they fluctuated that much but I'm not seeing it be that much more interesting. Maybe it would be interesting to have a rotation that changed from time to time, but can you imagine the LFR derpitude we'd see?
Personally, I really don't like the idea of holding on to older gear because it's itemized better either. While gear isn't my goal, I hate when there are no upgrades available to me in an entire tier for a slot. I hate having a piece I know they designed for my class but passing/disenchanting because the itemization sucks.
As it is, I haven't heard any suggestions before that I think would be more interesting than what we have already. We have a "best" stat but we have maintenance stats we have to take care of first. Prevents us from just absolutely maximizing one stat but isn't too complicated. I like reforging for exactly the reasons Lore mentioned; I hate having to collect multiple pieces to put on a better item.
"he doens't need healing, he doesn't need healing, he doesn't nee-WHAOSHIT!wtf was that man!". Please stop leaning on TDR. -Teng