Thank you for the question. Yes, capsulectomy surgery is "easier" for breast implants above pectoralis muscle compared to breast implants in the sub pectoral space. In the sub pectoral space, the posterior surface of the capsules may be attached to the patient's rib cage: capsulectomy surgery exposes patients to risks such as increased bleeding and/or entrance into the chest cavity ( causing complications such as pneumothorax). I hope this helps.
In theory the en bloc capsulectomy ensures the maximum amount of silicon is removed without contaminating the body further. It also allows your breast tissue to return to its natural and normal state. Over, rather than under, the muscle may be easier; but a board certified PS should not find either procedure difficult