If not keep a list of other never-before-seen ship-names / registries you can plausibly attach to a canon ship-class or a canon refit, with a "suffix" like "U.S.S. Zaire-C", "U.S.S. Mandela-B", "U.S.S. Vonnegut-D", "U.S.S. Zimbabwe-E", etc.
The only ship that should have a registry suffix is
U.S.S. Enterprise to honor Kirk's ship. Remember, the producers recanted the NCC-1305-E registry of
Yamato.
You're making up rules. The Enterprise isn't the only ship in a massive fleet,
to have a name worthy of honoring with a suffix.
The Lakota had a suffix showing it wasn't the first of it's line.
I am all for the Enterprise being regarded as the legendary line,
but your argument really doesn't make alot of sense to me.
As for the Pocket Books Trek writers, I have read many,
and I mean many different Trek novels from them and they have
almost always seemed to strive towards staying in canon and
even regarding other writers works.
And it's "trekkerguy" people, I would have capitolized the "T" and "G" if that's how I wanted em.

I do intend to "Blaze my own trail" with my writing at somepoint.
But I also intend to keep in mind the work of previous writers who came before me.