Treatment for Thigh and Butt Skin Laxity?

I just reviewed your picture and post.
The pinch maneuver that you do in the picture shows that you have enough laxity to repeat the procedure and get a significant correction that would go a long way in making you happy.
As far as the issue of an extended inner thigh lift, it would not help or even address the problem that is upsetting you. If you can imagine a vertical line going down the middle of your thigh, the butt lift and outer thigh lift will address the outer thigh, and the inner thigh lift will address the inner thigh.
To me, the key to a successful outer thigh lift is taking out the hip skin starting from the point just above the saddle bag. This stretches and elongates the thigh skin maximally.

Thank you for your question regarding treatment for your thigh and butt skin laxity. There are several treatments for the thigh and the buttock in terms of skin laxity. To be clear, liposuction is not an option for skin laxity. To improve skin laxity, skin must be excised. Therefore, regarding the thigh, multiple incisions can be placed. A crescent skin area can be removed if the upper inner thigh bothers you. This is called a crescent thigh plasty or a mini thighplasty. Sometimes liposuction is involved. If the upper inner thigh bothers you and it approximately goes into mid-thigh, you may need a modified longitudinal vertical medial thigh lift. During this procedure, thigh liposuction is performed, and an incision is made from the groin partially down the inner thigh. If the inner knee bothers you, I suggest thigh liposuction and an incision from the groin to the knee. To be complete, a more rarely performed thigh reduction procedure on the outer thigh involves an incision from the hip to the lateral knee. This is on the outer thigh but is usually reserved for extreme situations. I don't think you need this. In regards to the buttock, the buttock should be lifted. This is made with an incision across the top of the buttock.
Some of my patients call this a Mcdonalds sign or a seagull sign. They call it the Mcdonalds sign because that results from the shape on top of the buttock. In my opinion, the buttock should not be pulled down by making an incision underneath the buttock if you make an incision underneath the buttock and pull the backdown. The buttock lengthens and has an odd shape. In addition, I don't think the butt should be lifted inside the vertical buttock crease; this pulls the buttock together but does not lift the buttock. The buttock crack can be lowered with the Mcdonald's sign lift. The thigh lift and the buttock lift can be combined into one procedure. These procedures must be completed under a general anesthesia plan for at least a 2-3 week recovery. I've hoped I answered your question regarding what to do for butt and thigh kin laxity.

No two patients are ever exactly alike and for this reason, procedures are often tailored to meet the patient's specific needs. Your history suggests laxity of the buttocks and posterior thighs. Under these circumstances, procedures directed at the medial thighs would have very little impact upon this anatomic area. Correction of this type of problem would require a procedure that addresses the thigh and buttock area.Unfortunately, without a physical examination, it's virtually impossible to make a specific recommendation. In general, a variant of the lower body lift would elevate the lateral thighs and buttocks and simultaneously improve contour. With design modifications, this procedure might also address your buttock crease concerns.If you're considering this type of procedure, it's important to consult a board certified plastic surgeon who has experience in this area. This surgeon should be able to formulate a treatment plan that addresses your anatomic findings and achieves your aesthetic goals. 

Looking at your picture you probably need a repeat of your thigh buttock lift with a better design of the incision.
The present incision is too high and that is why your "BUTT CRACK" is too long.
The design of the scar need to be improved, whether this will improve the butt crack will depend on the skin laxity in the back and center.
The butt is deflated, you may benefit from a lift and enhancement of the buttock.
By your pinching the skin, it shows that you still have a lot of excess skin.
You may also improve on the butt shape by liposuction of the illac crest love handle area as well.
Only after consultation we will be able to advise you of the options and the results you should expect.