I think Dawkins could easily be very good at LG, but I also feel like the O-line wouldn't be getting the best overall value playing him so close to Williams with the right side lacking in talent in comparison to the left, and the inexperience of Cody Ford; I'd like the talent to be dispersed along the O-line, to start things off in this scenario.
Nsekhe is great depth, but he's not bringing what Dawkins brings as an overall blocker and Spencer Long was pretty good at LG for the Jets; I watched Long in his blocking assignment versus Kyle Williams and he did a pretty good job, and by 'pretty good job', I don't mean 'decent'. He seems to hold up well at the point of attack.
I don't believe my eyes were deceived, because I listened to a Jets' fan speak on Long's departure, to gauge his value in the fans' eyes, and he pretty much stated that the Jets' O-line production improved when he was moved from the center position---where he struggled---to left guard.