I was messing around with /click macros this weekend because I wanted to be able to change my casting sequences quickly. I ended up using a /click MacaroonButton# to a visable bar. Then I made up a bunch of different dps macros and just swapped the one I wanted onto the “MacaroonButton#” and presto instant change to spell rotation. This allowed me to switch from "trash_dps" to "boss_dps" and even "pvp_dps" rather quickly.

I hope it helps or triggers a good idea.