IMO this should be priority for SE to improve the UI.

Since Aion MMO era, stacked actions is already norm. I'm not asking for drastic changes, as I main pld, I'll use the following example.

1) Fast blade=> Riot blade=> Gloring blade = 1 button, 2nd button Royal authority. This reduces 4 buttons into 2. (However players still have the option to put 4 skills into quick bar if they choose to). Actual usage=1,1,1 for gloring blade. 1,1,2 for royal authority
2) Total eclipse=> Prominence= 1 button. This reduces 2 buttons into 1. (similarly let players choose if they want it this way).

6 buttons becomes 3. Muscle memories can be re-train, at least let us players have this option.

P.S. This is not new btw, already implemented in FF14 PvP.