As someone who's on a first character and isn't trying to make a dedicated crafter alt, it drives me crazy that so much of my precious inventory and bank space is occupied just by equipment that I'm going to research. At any time I have about two upgrades worth of space rendered completely unusable with "to be researched" equipment. It also adds the annoyance of having that equipment come up in the list every time I go to deconstruct junk, so I've accidentally deconstructed things that I was saving for research. Plus it's sorted in with all my other equipment I'm picking up, wearing, swapping out, trading, and so on. It's extremely frustrating, annoying, and discouraging.
What if, when we click on a weapon/armor in the research window, we could "use up" that item just to unlock the option of researching the associated trait? We would still have to find the right items, run back to a crafting station to put in new research, and it wouldn't decrease the value of skill points in those crafting lines. All it would do is keep us poor casual players from lugging around two dozen items and being paranoid about constantly checking which equipment it's safe to deconstruct/sell/trade.
Admittedly it makes more sense to actually have the item you're researching when you're going to do the research, but then again the research system doesn't make a lot of sense in the first place and is obviously designed for game balance rather than immersion.