Not really. Since this is based on a Franz Joseph design, and FJ's tech manual assigned registry rnumbers not chronologically but rather by vessel type (i.e. scouts/destroyers are 6XX, heavy cruisers are 1XXX, dreadnoughts are 2XXX, and tugs are 3XXX), there's really no problem.
Um, is that a TOS purist system?
Define "TOS purist" in a way that doesn't make me think you're trying to be an insulting elitist.

I was just asking if that registry system was designed for TOS since I've seen 7XXXX used for Galaxy, Nebula and Intrepid Classes. Looking at them, they appear to be of different types.
Some Excelsiors don't have 2XXX for their registry numbers.
