Job action combos one button

[Rongway]

That one wouldn't work because the Afflatus skills need lilies so you're hamstringing us when we're out of them.

No, it would be like any action that changes to another action while under some effect. Just to pick something off the top of my head, when RDM has 20|20 gauge the action Moulinet upgrades to Enchanted Moulinet. WHM could easily be changed so that when you have one or more lilies, Cure II is upgraded to Afflatus Solace and Medica is upgraded to Afflatus Rapture.

Edit: Summon Carbuncle... That is something that I don't consider bloat itself because technically you never have to press it unless you die

...but in what way is that not bloat? There is a button on your bar, that you never press but once per life; and you have another button that you can use often but not at all until you first press that one button that you only press once and then never touch again. Why wouldn't you want to make the button that you press once and never touch again change into the other button that can't be used unless you've pressed it?

(Yes, I know, SMN already doesn't have many buttons; however, it can be true that SMN doesn't have very many buttons and simultaneously also they still have buttons that can be reasonably consolidated because one is locked behind the other.)