Is leaving the capsule in during breast implant removal ever beneficial?

Leaving the capsule at the time of breast implant removal surgery is not necessarily beneficial but removal of capsules may result in skin contour irregularities, if there is damage to the overlying tissue/skin (during the capsulectomy procedure).  Some general thoughts regarding the need for capsulectomy may be helpful to you.Generally speaking (in my opinion), unless the breast implant capsules have thickened (and/or are otherwise symptomatic), are associated with the ruptured silicone gel breast implants, or if the patient has concerns about "medical conditions" related to the breast implants, capsulectomy is not universally necessary. For these patients, en block removal of breast implants is a good procedure.
***On the contrary, capsulectomy can expose patients to additional risks, such as bleeding, size loss, contour irregularities and other serious complications. In other words, any maneuver performed during surgery exposes patients to additional risk (morbidity). For example, attempting to remove very thin capsule densely adherent to the patient's rib cage may expose the patient to significant bleeding and/or entrance into the thoracic cavity.  The good news:  breast implant removal surgery is a very well-tolerated procedure with minimal discomfort,  compared to first-time breast augmentation surgery. Patience is definitely indicated after removal of breast implants; it will take many months for the skin to “bounce back” and for you to see the final appearance of the breasts.
I hope this helps. Best wishes for uneventful surgery and an outcome that you will be very pleased with.

Unfortunately, you have not provided photographs or told us your bra size.  However, I rarely remove the capsule unless there is indication such infection or calcification.  The technique I recommend is explantation using The Bellesoma Method.  The implants are removed, your breast tissue is reshaped creating upper pole fullness, elevated higher on the chest wall and more medial to increase your cleavage.  Vertical scars are avoided, nipple sensation and the ability to breast feed are maintained.  At the same time or later, fat transfers can be performed if additional volume is desired.Best Wishes,Gary Horndeski, M.D.

If you have the old gel implant, the capsule needs to be removed to try and remove all the leaked gel. If you have a saline implant or the new gel implant, the capsule may or may not be removed. If the capsule is very thin, it can be difficult to remove and may cause some bleeding. If the implants have not been present long, the capsule may not have completely formed and can be left. Women who have very little breast tissue or whose tissue has been thinned with heavy implants may do better if the capsule is left in order to avoid tearing the skin or interfering with circulation to the skin. Every case is different and requires judgment on the part of the surgeon to decide what is best.