I didn't even know you could do that with macros. My solution to this problem isn't as elegant, but it works.

I just made it so I have hotbars 1-3 always showing with the abilities I use, and the cross class skills on hotbar 1. I then recreate hotbar 1 on hotbar 4, replacing the cross class skills to what they should be, then when I make the macro, it switches the role abilities around and shifts the 1st hotbar to show the 4th hotbar instead. I have a second macro that readjusts it back to the first way, and changes the 4th hotbar to the 1st hotbar. It WORKS, it just isn't as nifty as what you used to be able to do, apparently. It could be used in the meantime, if need be, I suppose.