The number of buttons doesn't equate with complexity. The average MOBA has you pressing like what, 4-5 buttons in total and yet is miles beyond anything this game can offer in complexity. It's about decisions per minute, not buttons per minute.

We know from prior experience that the game designers are going to likely add in a few new actions. They are also likely to remove a few new actions. Which would you prefer to see: similar abilities that are context dependent be merged on to the same button (i.e. Sheltron if I don't assign a target, Intervention if I click on someone else), or would you rather they start ripping random abilities out of your kit and fingers crossed hope that things still work? The latter was what they did to DRK moving from Heavensward to Stormblood, and it wasn't pretty.

At the moment, excluding role actions, we have PLD at 26 actions, GNB at 28, DRK at 23, and WAR at 24. At least some of that difference is bloat. If you identify and get rid of the bloat, you'll have a more engaging job to play when new abilities get rolled in on top of them. It's time to declutter. If it doesn't spark joy for you, into the bin it goes.