I really don't see a purpose to making the menu function differently with Juggler, especially if rebinding quick keys (or apparently even knowing they exist) isn't something that every player picks up. Furthermore, I could easily see Juggler being nerfed down to just the on-hand/off-hand pair, as long you could still bash with an appropriate off-hand item. As it is, it's starting to feel like it's too powerful for me to pass up. Of course, I always try to have one of every weapon anyways so that's really just the game catering to my (probably poor) playstyle.
Regardless of Juggler, I like the quick keys and would be sad to see them go no matter how Juggler interacted with them (or did not).