Loving the effort that goes into this - whether it be design effort, or explaining effort!
Portholes on saucer rim is not what I'd consider a problem in any Trek show, as TOS already pretty strongly established that those things don't meet anybody's expectations. Nacelle swaps sound natural, too. And the less vanity paneling there, the better. I just hope we'll get to see a few pans that connect the interiors to the exteriors. I mean, we haven't even gotten one that would properly establish the location of the Lower Decks accommodations in external view, right? (The animation doesn't involve much zooming in or out, but since it's basically CGI, this is more a stylistic than technical limitation.)
Timo Saloniemi