I made this suggestion awhile ago, and I also pitched it to STS.

This does have a chance of getting implemented because we are about to see a huge influx of people with physical keyboards (i.e. Chrome users).

STS doesn't like to give competitive advantages to one type of device or user. Being able to quickly type out directions to fight a boss or to arrange a PvP team is a huge advantage.

A way to level the playing field would be to add more quick-slots, as either a scroll-down list or by adding tabs for extra pages.