Do I need a revision chin lipo? My jawline contour is not as tight and defined as I was hoping for.

Hello, thank you for your question. You may benefit from FaceTite (NeckTite), any areas on the face and neck with saggy skin can be treated with FaceTite. This includes the double chin, the neck, the jowls, the jawline and mandible, and marionette lines as well as other areas with deep lines and loose skin. I recommend you to schedule a consultation with a board certified plastic surgeon.

Thermitight will tighten the skin under the chin and achieve a better profile. It can be combined with revision liposuction if you feel not enough fat was removed during the last procedure. It is a quick procedure with fast recovery. RegardsDr. Janjua

You have likely removed most of the offending fat.  Now, tightening the skin will help. You are young enough that a necklift is not the right way to go.  I'd do something like "Facetite" which uses radiofrequency energy to tighten the skin. It's a quick, in office, procedure that truly works.