Honestly good riddance to skills hogging 1 extra slot that can only be used after you used a specific other skill. That dragoon change back in the day where they split the high jump skills was a prime example - they should have introduced the system back at that point in time.
Now we only have to get rid of skills that have an exact copy of said skill but aoe... another additional button you could just update animation, add splash damage and have 1 free skill slot for unique job skills that isn't yet yet another 300potency ogcd damage/heal

That said I think healers won't really benefit from that change in the long run and they will have to come up with something that helps with their button bloat soon