Love that we finally got capes but the hiding stowed weapons is a bigger deal for me. I've been asking for this for the longest time since stowed weapons clip with backpack items. I'd love to see the ability to use shield skins as backpacks. Basically just add shield skins to the backpack skins list.
I'm going to throw this idea out there which may or may not be popular. It's just an idea. Merge Shields and Backpacks together; taking shields out of the weapon category and giving the merged shield/backpacks a passive defensive skill along with a offensive skill somewhere on the HUD. Maybe to the left side of the tool belt right above the weapon swap and first weapon skill. The defensive/offensive skills could be profession based as they are now.
I personally don't use shields and haven't seen many players that do. For professions who use shields it could be replaced with another weapon; example Engineer could get off dagger, torch or axe which all fit in with the engineer.