I'm a healer/dps and i have a full set of healer based gear and a full set of dps related gear. It may sound petty but I usually roll around in the dps gear. When I switch to healer I have to manually go into my inventory and switch out 9 to 10 items before I'm properly geared for that role. I assume controllers and tanks have the same issue. And in PvPland (not the matches) if you get jumped by 1 or 2 opponents and you're not in the right set of gear, you pretty much get rolled before you can "change clothes." It would be nice if we could set up a gear box for dps and another for whatever other class we play and switch between the two a bit easier. Its also too easy to miss a piece of gear when you have to swtich every item manually. I know its a minor point but would be nice to have.
In Ragnarok Online, people have the ability to hotkey their gear to be changed on the fly, adding a layer of dynamic-ness to the pvp system.
