Good, yes, but like I said, falls behind greatsword without weapon swapping cheese (which IMO is a good reason to allow weapon swapping cheese).
Yes, but without weapon swapping cheese, each of those 4 attacks is dealing about half the damage of a greatsword attack. With weapon swapping cheese, the damage is pretty comparable. But, the dual wielder needs to use one of their weapon masteries on Nick to get that many attacks, and is basically forced into Vex for the other, whereas the greatsword user gets Graze, which is low-key the best Mastery for single-target DPR. Strength mod damage on a miss isn’t as sexy as the various rider-on-hit masteries, is a huge boost to damage consistency, which matters a lot for single-target DPR.