It’s really annoying when you try out and like different builds but using them means either cramming your bank full or locking up half of that character’s inventory.
The first thing would obviously be save-able trait builds, I’m not really sure why this isn’t already a thing. The second would be a craftable item that can hold an entire equipment setup, once you load it up with a specific set of gear and save it you can use it to automatically swap your current gear with its counterparts in the item with a single use.
I know people will probably say that it would create problems in wvw and harder pve stuff by letting players very quickly change setups and fill too many roles so it probably needs a 10-20 minute cooldown. This would be solely to fix clutter and make changing your build less of a headache.