We have had 2 small updates in the last three months to update the nav data, so anyone saying that it is not a thing is wrong.
Also, the Working Title team with the CJ4 has shown the the internal nav data is much more complete then what the stock avionics expose. They have said that pretty much everything is there, it is just being filtered/discarded by the stock avionics.
So before we sat bad things about NavBlue, we must consider limitations of the stock avionics in which data they show.