I have a 28" inseam and I am fine with the NC.
No, both feet are not on the ground and flat footed.
But that has never been an issue for me and the NC.
I had other bikes where it was an issue.
We had a beautiful 2013 Triumph Rocket III Touring machine.
That was 850 lbs. and I could not flat foot that bike.
That one I did trade in because of that issue.
But the NC is just too light and easy to handle for me to consider lowering it.
In fact I was just yesterday climbing a back-country mountain road with it that had nasty cut backs and a lot of huge loose mountain stones.
The worse (but yet most fun?) road I have ever biked on.
The NC took it fine and even with the 28" inseam I was confident on it.
Yes, you cannot flat foot it.
But can you get enough foot down either side to handle stops?
That is what I would consider.
Have you purchased the bike or are you considering purchasing?
If you own it have you been out riding it and getting comfortable with it?
I have had mine 3 years now and have 8200 miles on it so I have gotten very comfortable with it.
Those are some thoughts that come to mind.