The problem is that we don’t know when any of the DSC ships were constructed. We start out 200 years before with the Phoenix’s round nacelles. Then 100 years later we get the NX class, Intrepid type, Warp Delta type, ECS freighters, etc., all with round nacelles. Then 90 years after that we see the majority of Starfleet ships with angular boxy nacelles, including what seems to be a brand-new class (Crossfield) with the same boxy nacelles. But then a monkey wrench is thrown into the mix with the Constitution class. When was this class constructed relative to the other DSC ships? And if it is a contemporary to those ships, why does it have round nacelles when every other ship shown doesn’t?