I took the "over 150cc" test about 37 years ago on a Kawasaki 400. I don't need to take the test again, but I practiced the course at the DMV while helping my wife practice for her license last year. I'm sure the course layout varies from state to state. Ours was pretty darn tough to do on a Goldwing 1800, but a cinch on the NC700X.
To me, the NC is like the trials bike of the street, and there's no mid sized motorcycle I'd rather use for a DMV test. The low CofG is a plus, as well as the low end grunt and the good feel of the rear brake for accurate speed control on tight slow turns.
In my opinion, intentionally taking the test on a bike other than the one you intend to ride because otherwise you would fail, is "cheating". Sorry you missed on the test, but I'm gonna be honest and say, you can't blame it on this bike. I'm getting a bit defensive here because you're blaming the test failure on the bike - MY BIKE. Watch this video before you say "That bike isn't designed to do that." https://www.youtube.com/watch?v=RTVyLfeRwUk
Practice more and/or take a motorcycle training course and you'll get it.