My easy response is your result is acceptable. But try exercise and increase abdominal muscle.Otherwise a TT might be your next option.
Thanks for your question and the pictures. Without an exam it is hard to say with certainty, but you may just have some protrusion from things that are intraabdominal. With weight gain, pregnancy and other normal conditions the abdominal muscles can have some separation. This leads to an area of protrusion especially below the belly button. This condition is best treated with an abdominoplasty. Hopefully, this can be better discussed with your plastic surgeon, since it really does take an exam to determine. Best of Luck!