What I want to happen: Levelling stops at 100, and we move towards some kind of horizontal progression for each expansion, with customizable/optional job actions.
What probably will happen: Level 110, but maybe it'll be called something different. New actions will continue to be forced onto our hotbars, replacing beloved older ones.
CBU3 doesn't like straying from their formulas - even for the smallest and most inconsequential things, let alone something as central to the game as this.