On the other hand, there's certainly something to be said about just having more capital ships. Three ships that are not quite as good can still be in more places at once than two ships that are really good.
It's not like the Federation doesn't like to make lots of big ships either. The Excelsior is a lot smaller than the Ambassador but it's still a big ship (numbers I've seen putting it at north of 2 Mt) and
Starfleet still produced almost as many of them as it did 300kt Ushaans. The ratings are relative to the class remember. That D+ in Manufacturing we got from shoving all those prototypes into the Ambassador-class isn't just the cost of it being a capital ship and so being harder to produce than something smaller, it's saying the Ambassador is a disaster to produce for a capital ship. If we put a bit less prototypes in it I think we could have gotten another 6-12 ships produced. I'd rather avoid getting a disaster score on the Sovereign.
Sorry, but uh, didn't the variable coils win 47 to 46? Unless there was an undeclared early end to voting, or I mucked up the vote counter somehow.