The turrets look the same to me... I really liked the pulse phaser effect, even though it's not exactly like the WoK phasers.
I wonder if the new Impulse deck as because the Enterprise was somehow feeling under-powered? What other changes did they do to the Enterprise?
I also have the notion that the broadside torps are also a new refit from when we last saw the grey lady in Trek 11. Enterprise still feels like a prototype that is continually undergoing changes and refits as a trial model for the entire class. Vengeance was newer yes, but for all we know the chassis might have been commandeered or she was already in production as a Dreadnought counterpart to the Ent's Heavy Cruiser.
It's a year later isn't it?
After the Vengeance incident I guess Starfleet could at least look at the technology involved in the ship and consider what was worth salvaging from that class and retro-fit their existing fleet to meet the improvements.
The Enterprise was just lucky she got tore up BEFORE her 5 year mission, otherwise she might have been sent off and be obsolete before she got 2 months in