I think that it would be useful to be able to put two one-handed items into these two slots specifically (but any hotkey slot ideally). It would make switching from two one-hand items to two different ones a lot more fluid with a lot less panic. The current system works well enough as long as there is only one item you consistently want in your off-hand, but I think this would be nifty. If this has been suggested already I apologize in advance.