I think you're really on to something great here, Azel!
Your interpretation of the Galaxy Class looks like a more advanced/evolved version that would be a more "realistic" replacement for the Enterprise D.
I would really like to see this ship leave drydock after the Galaxy Class nears the end of its design lifetime, somewhere circa 2460....
Oh yeah, and she's a LOT bigger than her predecessor, a true voyager that goes on loooong missions with a multimission platform requiring a crew of thousands.
Yeah, I'm gettin' carried away here...