Personally, I like their macro policy in general. I can't stand games where you pretty much have to macro to perform at your best. I like that there's a trade-off here.
But this particular change, to me, doesn't go against their policy. And if they think it does, they're already violating that policy, because you can already get the same effect by copying hotbars with macros on them back and forth through /hotbar or /chotbar.
That's not to say I think they will implement this feature. I think they should, and I don't think it violates their policy. But I'd still be surprised if they added it.