While this is all true, I was referring to the actual CGI fleet shots, and why only seven ship classes were represented (plus one Nebula in one shot), with the majority of the number of ships being outdated Miranda and Excelsior classes. I know I sound like a broken record because I've posted this so many times, but I hope that when DS9 gets remastered, the original CGI VFX gets replaced with new scenes with new ships.
I don't understand what you mean by this? It was likely a question of money, CGI starships aren't free and I think Okuda and co just thought it would be cool to say yeah there are even other designs that are never onscreen, Like Hokule, Rigel, Apollo, etc. There really is no other reason why in my opinion anyway. No other models were made or available at that time with the Ambassador model (supposedly) being bashed up from some earthquake and the connie refit too big and bulky. I do believe however that the fleet scenes had a perfect mix of newer and older starships and it never bothered me that Miranda's and Excelsior's were there in large numbers since it gave the fleet dynamics, plus I love those designs