Gyro rotorblade manufacture's don't have much design leeway with dreadnought gyroplanes due to the gimbaled rotorhead.
If they made their rotors to agree with Cierva's ideal design spec.'s, the rotorhead and blade assemblies would need to be larger and heavier than they are now and they would be a cyclic shaking arm-full.
No problem if the rotorhead is semi-rigid or articulated.
The Cierva and Beaty ideal gyro spec.'s for a good all around performance are:
Blade Loading: 35 lb/sq.ft.
Disk Loading: 1.3 lb/sq.ft.
Blade Tip Speed: 400 ft/sec. (Note that if you double the tip speed, the profile drag power requirement increases eight times.)
A well designed single place gyro can meet those spec's.
A heavy 2 or 3 place dreadnought gyro however, needs either a 2-bladed semi-rigid rotor or a three bladed articulated rotor to provide a decent rate of climb, higher altitude, smoother flight, etc.
True....what we have now can get us in the air but a better rotorhead assembly would, in my opinion, have better performance, and be smoother and safer.