They don't stick huey blades on them because they are too heavy and you would lose useful load. The current blades are fine and the R-44 autorotation characterisitcs are excellent.
They did increase the weight of the R-22 blades to help autorotation characteristics. However, they didn't change anything to the tail rotor or the power output limitations, and the useful load was reduced.
As a mechanic I can assure you I do not remove the blades of any helicopter when I weigh them.
A crane is the lifting force. The blades are not the lifting force in a helicopter. Lift is the lifting force. The amount of lift produce must be equal and opposite to the weight of the entire aircraft including the blades in unaccelerated flight.