The average power generation (reel-out) phase value is 13.8 kW, but the average power value is 5.75 kW, which is the number to take into consideration.
Payne’s crosswind motion should be studied but I think the only real difference in terms of efficiency with reeling (yoyo) mode is the almost continuous alternation of the delivered power.
Imho the Scaling in numbers rather than size topic is the siamese brother of the Scaling by size topic.
Yes, and some variants (US6616402, figure 88 for example) of SuperTurbine ™ that are discussed make a good approach of both, although I would prefer a single larger rotor because of a supposed easier management of takeoff and landing and flight operations.