Why not just enable the ability to use ANY pre-existing in game icon for macros? I have an add-on for Rift that does this, and its really nice at how many thousands of Icons I can choose from. It makes it a lot easier to find that perfect icon.
How about more macros in general...2/5 pages of my macros are used just for changing between 16 of the 18 different jobs. Doesn't leave a lot of room to actually use the macros for those jobs.