Please suggest if microdermabrasion will improve acne scars, PIH and PIE? (Photo)

Or if there are any other treatments for brown skin. I have scars, PIH & PIE from acne. I have done microdermabrasion about 7 years back and found it had improved my scars then. Now I went to a dermatologist to get microdermabrasion done and she suggested to get microneedling done and that microdermabrasion will not improve my acne scars. I have brown skin so I just need to confirm that microneedling will not cause more pigmentation later, also it's very expensive.