I've heard good things about the Juggler trait, and it happens to be a prereq for at leas tone fairly powerful mastery. However, as much good as it is to insta-swap weapons, I use a laptop and therefore cannot in any way get full use out of the trait.
To wit: I cannot use the numeric quick-keys, as they are instead bound to the function-keyed numpad. Nor will the game suffer me to bind quick-keying weapons to a combination of keys, be they otherwise used or not - tested with SHIFT+, CTRL+, and ALT+ for numeric keys, and with CTRL+W for the pistol quickkey.
This leaves me feeling rather short changed. I would therefore like the next version to either allow quick-keying weapons to a key combination, or - and I suspect this is easier - to modify Juggler such that it allows instant preparation of weapons whether by quickkey or menu. Since one can already bind new quickkeys to be able to juggle all the weapons you wouldn't expect to be able to, I don't see the latter as a buff even if it lets you instantly prepare all the weapons in the game, since that can after all already be done.