[FT] Agility

How many of you vac heads would like to see a ship's Turn ability be
uncoupled from its Thrust rating? For example, perhaps you could
build:
Freighter: Thrust  4 / Turn 1
Courier: Thrust 7 / Turn 2
Destroyer: Thrust 4 / Turn 5 (note that Turn is greater than Thrust on
this one)

And if you like the idea, what house rules would you suggest?