The desire to minimize the length of the incision is Admirable but limits the capabilities of the facelift. Facelift incisions are almost invisible and the results of a properly executed facelift are predictable and long-lasting.
It can be frustrating to have something not turn out exactly as you hoped. A MACS lift is limited in treating the neck, but without pictures it is hard to tell. I can tell you if you were my patient I would want you to come to me and tell me how you feel so we could review your pictures and talk about options to get the very best result. I would encourage you to talk to your surgeon, at one year revisions can typically be done if indicated and you could have the look you wanted.
MACS lifts are minimally invasive but often fall short when tightening the neck and treating marionette lines are a priority. I suggest first trying Ultherapy to see if this nonsurgical alternative would sufficiently tighten your skin. If not I recommend a Secondary Facelift using a different technique. Good Luck.
Without seeing photos or you in person, it is difficult to say what would be best for you, but if you feel that you have sagging around the jaw, then perhaps this can be revised using a different technique.
In my opinion limited surgical facelifts gives somewhat limited results. For someone over 55 ,and who may have looked older than her age , a more extensive facelift could give better long-term results. However many of these limited type lifts , such as the MACS lift ,can give long-term improvement. Further work might be needed to give you the results you're looking for. Sometimes injectable fillers can work for what you describe.