It looks as if a fairly large area was treated with traditional liposuction.
It may still have swelling even after 6 to 7 weeks. Give your body some
time to heal and re-examine yourself after 6 months. If it is still uneven, then definitely explore Coolsculpting. Coolsculpting is meant to take care of selected areas and destroy the fat cells in a specific area. It would work for what you would be looking to do. However, it is just too early to tell what the end result will be in your case. Everybody responds differently.
Cool Sculpting can be used in fat pockets such as "bra fat" and other areas. The only way to determine if you are a candidate would be an evaluation in person. Please consult a board certified dermatologist with a lot of experience with Cool Sculpting for the best cosmetic results.
Coolsculpting could help, however it is difficult to determine how many treatments you would need. If you are seeking better symmetry, you may need revision liposuction or some skin removal.
Coolsculpting can help reduce pockets of fat, such as the ones in your picture. To tell if you are a good candidate however, I would recommend being evaluated in person. This will also allow you to discuss expectations and the treatment. Coolsculpting was invented by Harvard dermatologists, so I recommend seeing an office where a physician with expertise in Coolsculpting will personally evaluate you.
6.5 weeks after significant liposuction is still early in the healing stage. After six months reassess yourself and consult with a board certified physician who can provide both surgical and coolsculpting options.
Cool Sculpting is an excellent way to treat Bra Fat. The picture you show from the back is a great example. The device will draw that tissue up for cooling.