Honestly I would done the same with TNG and replaced all the TOS film era ships with TNG era ones where appropriate.
I don't mind some of the TOS era ships in TNG. There was enough variety that it made sense, unlike TOS that used the Botany Bay for the Woden. Of course, TNG did reuse the Merchantman freighter from the TSFS to death.
I really liked how the use of the Excelsior class in TNG made that class into a long lasting workhorse.