it doesn’t increase recoil. However by not diverting and using the recoil energy there is more recoil. Recoil is a lot of concentreted energy so wasting it makes no sense - in a drone where battery life is already a problem it is worse. I suspect recoil is lighter than a servo as well but that needs analisys

if the highest accuracy is needed than recoil systems cannot give you that. However his is a shotgun why by design is not accurate. Still if doing a rifle system for longer range shots different tradeoffs apply.