You're right, there is some improvements that can be made to the system.
Firstly, some filtering could be a good idea, but the problem is not to loose responsiveness. Do you know some object or external in Max6 doing this ?
Secondly, some training of the operator is necessary to better control the system : each people in the example video has used the system less than one hour. It takes a longer time to become a good traditional follow spot operator...
Finally, the position of the moving head is a quite important factor in the final rendering. I think it should be on the front of house bar to match better operator's movements.