Further update: buyer's remorse is growing. Last night (in the middle of dinner out) the phone suddenly gave me a "PUK code locked" indication. Power-off reboot fixed the problem for a few minutes, then it reoccured several times. I visited the Verizon store, where the SIM was swapped out, which has seemingly cleared the problem.
However, I asked if it was possible that the contact between the phone and the sim (not at the contact point, but the solder of the connector to the board) was at fault and was given a not-very reassuring "we'll see". Which I think is code for "yeah. But maybe a new sim will fix it long enough for me to not have to deal with you tonight".
I'm leaning heavily to the DNA having been a mistake now. I'll give myself until friday (7 days in) to make the decision, but I think it's going to be a return (and at the same time I'll take the opportunity to jump ship from Verizon).
I'm also not sure if this is DNA specific but speedtests on LTE have been substantially below the T-Mobile HSPA+42 speedtest thread for the most part and moreover the downlink has been slower than the uplink, indicating capacity constraint and this being a single band device and Verizon being a single band (LTE) company has me really questioning the wisdom of staying with Verizon. Also the fact that I, being a complete idiot and perhaps not even sentient, gave up unlimited data to go with the shared data plan. It's a side note, but it's sort of important in that the decision to stay with the device and Verizon would be easier if I had unlimited data on it.
On the flip side, the underlying reason that I bought the phone (that being the display) is panning out well. The display is awesome.