Before proceeding with any surgical treatment for acne scars it is extremely important to have covered all other possible bases of treatment.
1) Is the acne condition under control or are you still prone to breakouts and cysts?
2) Are you using antibiotics, topical or oral?
3) Is the acne hormone regulated?
4) Have you tried Accutane?
5) What kind of skin care and exfoliants are currently utlized?
6) Any laser treatments tried, BBL, fractional laser, ablation, etc?
Only after all these issues have been addressed would I proceed with scar revision. "Punch" techniques are good for pock marks and small defects but can be disappointing with larger areas. Larger excisions can be risking with the resultant scarring. Often, less is more......