Monstrosity? it's a beautiful ship.
Only issue I have (outside of it being Promo) is that the phasers are the wrong colour.
The 32nd century starfleet weapons in the show were a blue-green, maybe Teal, color.
Also, why Janeway Class? It was called an Intrepid Class on a computer screen in the show (and CBS also told TrekCore it was). Is that to avoid confusion?
As for Lower Decks ships, the California Class at least we won't get until after Season 2 airs at the earliest, because the show creator has said the Class has some sort of unique ability that we haven't seen yet, so Cryptic wants to wait until that's shown off.
I really want the Parliament Class though.