Hehe. Sounds like a winner.
There is actually a raised part on the bottom of the saucer section, it was just hard to see in one of the renders. Ill post some close-ups later so you guys can see it...but the sep saucer hull is still being worked on, so the shape is tentative.
I also forgot to mention that this is actually a 4 nacelle ship...two of the nacelles are hidden in the saucer section, port and starboard. They are usually not active when the saucer is docked, but can be brought on line in case of failure of the standard nacelles...and can also operate with the others to increase speed. Without both nacelle sets active the ship is substantially slower at warp than a Sov, running a top speed of only warp 8.5. She is built like a tank, so she flies like one.
Maneuverability suffers as well compared to a Sov, but in weapons, shield strength, armor, power availability, cargo space and survivability she is head and shoulders above the former. This was part of the Advanced Starship Design Project (ASDP), of which the Defiant, Prometheus, Sovereign and Akira were brethren....as well as my Scorpion and the Infinity of course.
You know me...love the backhistory.