The following subcommands are notably absent from the /hotbar command:
/hotbar gearset [number] [#1] [#2]
/hotbar macro [number] [#1] [#2]
Please consider adding these. Among other things, they would make my macro-powered, hotbar-based Gearset Menu System much easier to manage. They'd also be useful for my macro-powered Crafting Macro Selector.
Trademarks pending :p