The Jem'Hadar Dreadnought flies and turns like an Exploration cruiser despite being wayyyyy bigger than "twice the size". The Dreadnought is nimble as hell for a carrier class ship.
All Fed cruisers need a turn rate boost of 1. No exceptions.
It should look like this:
Cruiser: 10
Advanced Heavy Cruiser: 9
Heavy Cruiser: 9
Star Cruiser: 8
Assault Cruiser: 8
Exploration Cruiser: 7
There is no reason not to do this when a frigging DREADNOUGHT that's
practically the same size as an Imperial Star Destroyer can haul its ass around like a Galaxy class cruiser.