Auto-attack

[Boricua]

Doesn't XIV share the same engine with XIII and Versus?

I would say yes, in terms of the ATB gauge is now the Stamina bar, but you can't really queue commands outside of the cumbersome battle regimens. In other words you can't do:

Spirit Dart > Fire II > Sleep

all against the same mob. Honestly that wouldn't be too bad to implement FFXIII's auto-attack system where you hit 'auto' and commands are automatically placed onto Stamina bar (that a mob is vulnerable to), stacked.