Macro Icon Change with Skill?

[Niwashi]

There's a really cumbersome way to do it, but you need to reserve several entire hotbars to storing each intermediate layout. Basically, you'd have three different macros, each of which performs one of the skills and then copies another hotbar to your main one. That next hotbar will have a similar macro in the same position, but it will perform a different skill and then replace your hotbar with a third.

If you were using Paladin's first hotbar, with layouts stored on Gladiator's 8th, 9th, and 10th hotbars, some of the macros could look like:

/macroicon "Fast Blade"
/action "Fast Blade" <target>
/hotbar copy GLD 9 PLD 1

and

/macroicon "Savage Blade"
/action "Savage Blade" <target>
/hotbar copy GLD 10 PLD 1

and

/macroicon "Rage of Halone"
/action "Rage of Halone" <target>
/hotbar copy GLD 8 PLD 1

But then you'd need to sort out how to manage Riot Blade with Goring Blade or Royal Authority. (It should be possible to come up with such a pattern. Quite a while ago, I worked out how to fit five Ninja skills onto two slots with all combos available. Wasn't worth actually using it, though.)

So, generally too limited to be worth the hassle, but it is sort of possible. Besides, by having main actions in a macro, you'd be losing out on the ability to queue actions in advance.