Do away with submerged cable drag by using a hydrofoil catamaran.
Mount the turbine between the foils facing front to back.
Tether the catamaran from a turret on the deck to a cliff (or a moored floating tower) above the water you drag through.
Control the kite from the deck turret.
It’s a weird mix of sailing arc sweeps with figure 8’s ends.
Gives good long power sweeps and no retraction phase.