Strictly curiosity, not trying to pick a fight.
What are the advantages of 'roving' RO's?
Some of the advantages of 'fixed' RO's:
A fixed RO only has to concentrate on officiating 1 stage, allowing him to really learn it, and run it as safely and efficiently as possible. They can find and fix any potential problems as quickly as possible (shoot thru's, wonky steel, 180 traps, etc)
A fixed RO can run every shooter the same way...instead of the RO on 'that squad' letting guys lean, creep, bend, etc...(it happens)
A fixed RO doesnt have to compromise his own turn at shooting. The other shooters dont have to work as RO's while the rover is on deck, shooting, or topping off.
Fixed RO's shoot the day before to shake-down the stages and the chrono.
Fixed RO's have the opportunity to pick up their brass between squads or during breaks. (assuming its a lost brass match, since its a major)
Fixed RO's get to see every shooter in the match run that stage, its one of the most educational experiences you can have as an RO and a shooter.