That's ironically very close to what I did with the Dualist, though my Dualist's power level is much higher than their Duelist, since she doesn't have to forgo an attack, can do it much more often, gets those abilities much more quickly, and gets other bonuses besides. I think it largely depends on the power level of your game, but I feel like the PF Duelist is further from my own personal desired power level than my Dualist is.
(And yes, the name Dualist is intentional, it's a bad pun; she's a dual-wielding duelist, after all!)