Actually the floor plan is the place they blew it. They could have done it REALLY right and made the deck perpendicular to the thrust vector, but they went with the Trek artificial gravity layout, instead.
Ooh, need nacelles. No nacelles then no warp drive, no warp drive and it's the 28th Century before we get to the battle.
Your renders are warming me up to them. They don't look design to be battleships though, like I say it's more like they've been press-ganged into war service. Which makes sense to me, never like the idea that we got out looking for a fight, we're just having fun exploring and making friends with Vulcans, Andorians, Telarites, Caitains, and then the Rommie's just don't wanna play friendly like.