This was actually mentioned in a Juggler thread about a month back; the whole "arbitrary use of quick-keys for Juggler" thing is intended to be changed or phased out. Juggler as-is can give anyone instant access to any weapon in their inventory, since you adjust what the quick-keys grab for. This is unintentional and we were told to expect it to be adjusted to, yannow, not work that way. So a lot of players think of it as kinda exploit-y.
One of the suggestions was to make Juggler a two-level trait, with the first working as actually intended (Swap equipped and prepared instantly, use melee from prepared if you have it) and the second level letting you get weapons from the inventory at the same speed. Another was just to keep it one-level but let people get stuff from the inventory at a discount instead of taking a full second (And again swapping equip/prepare slots instantly). Either way, don't expect to quick-key your way to a ghetto tac shotty in the next version, I guess. At least not without a second level in it, if they run that way.