Īn the Novel "Resistance" Worf orders the Enterprise to seperate into a Stardrive and a Saucer Section. Mind you, the Sovereign-class Enterprise! And it is not an emergency one shot maneuver, but supposebly something the Sovereign-class has in common with the Galaxy-class predecessors.
There seems to be a semi-official production drawing of an Sovereign class seperating .
Or more written material here.
So what do you guys think. In your little corner of the Galaxy can a Sovereign class starship seperate?