San Diego Lower Face Lift doctors

Absolutely.  At your age you are likely to benefit greatly from fillers.  This will buy you some time and allow you to really research your facelift.

Although it may seem artificial to compartmentalize your face, it is a useful exercise right now.  If your primary concern is descent of the oral commissure, then I am not surprised that you are disappointed.  The nonsurgical options you mention are all great for younger patients like yourself, but they are primarily aimed at improving skin texture.  The options to improve descent of the oral commissure include Botox to the DAO, surgical division of the DAO muscle, a Flowers-style commisuroplasty, and facelifting.  A facelift will obviously provide the most emphatic improvement, with the added improvement to the lower face and jowls, but it comes at a far greater cost.  Only you can decide if the time is right to embark on a facelift at your relatively young age.  Perhaps wait a few years until it really bothers you, and then go find yourself a really good facelift surgeon.

Injury to the frontal branch of the facial nerve is an attendant risk to facelift surgery.  You really do need to discuss with your surgeon whether the nerve may have been at risk from the dissection itself, or possibly from a suture placed at the time of the surgery.  From what you describe, the latter may be more likely.   There is a (sentinel) vein that runs alongside the temporal branch of the facial nerve, and the swelling is suggestive that both the vein and nerve may have been traumatized at the time of the surgery.  It does sound like the surgery was primarily directed at the lower face rather than your brow.  It may be that the nerve is involved in a suture, and if so it may be necessary to re-explore this.