It's still too soon to tell whether you will derive any benefit from tummy tuck revision. Over the next several months, you will continue to experience some mild improvement in swelling and some mild tightening of the skin. Seeing how everything looks fine when you're standing upright, it's very possible that the appearance will continue to improve with bending. I'd also anticipate that the appearance of the scars will improve with the passage of time; most scars evolve from thick and red to pale and white over several months to 2 years after surgery.
If, 6 months or more after surgery, you're still unhappy with your appearance, it would be worthwhile to seek additional consultation, both with your surgeon and with another if you disagree with his assessment. Best of luck!