If the OP wants to have their 1-2-3 filler condensed to one button, SMN and the healers are right there to experience said gameplay

But a lot of people are now complaining about how hollow the gameplay of those jobs now feel, so I would prefer it if they didn't remove more buttons. If they changed 1-2-3 into 1-1-1 and added two new cool buttons in the 2-3's place, sure, but this is SE. They removed Kaiten and replaced it with {nothing}, so we have to fill that gap with Shinten instead to keep our kenki under control. They removed the secondary DOTs from healers and replaced them with {nothing}, instead compiling the damage into the one main DOT and increasing it's duration to 30s, making the healer rotation a static 'press DOT once per 30s, then press filler 11 times in a row, repeat' unless healing is required, in which case, throw out one of your 4-5 completely free OGCD tools to instantly counteract the damage