+1 to subcision + sculptra. Finish it off with some facial hair and you'll be good to go.
Fat grafting won't do much for acne scars - since fat is too soft/palpable and sinks back down with the scar.
Your main temporary options are hyaluronic acid fillers - which are more for finishing touches and not overly deep scars and they last 6 months - a year OR something like sculptra/radiesse - which is more a deep filler and it works kinda like scaffolding attracting collegen to grow - it lasts about 2 years. Personally I think sculptra is the best filler to mix with subcision. The main goal of fillers isn't really to improve your result, it's moreso to prevent the scar bands from reattaching after subcision. Also a lot of doctors will mix different fillers together to give a better result.
For Rob, I feel like these scars are perfectly suited for subcision and volume replacement with fillers. In general fat doesn't seem great for small indentations, but are good for large areas of volume loss. For example, if your acne caused so much scarring that there is volume loss in the cheeks, ie sunken cheeks, then I can see how fat grafting would help replace that volume and give a more normal contour. If you have small but numerous indentations, then most doctors I've read on Realself say fat is too globular and lumpy to be injected smoothly beneath a small indentation.
Also, in the fat grafting pics on that doctor's site, notice that they all had significant volume loss in the cheeks. That is why fat grafting was appropriate. If say they had smaller, but numerous indentations, fat probably would not have worked so well. Isn't it also interesting how acne scarring can age a person through the loss of volume?
What kind of fillers are we talking here?
In my opinion they are worthless since they dissolve after few months and the scars reappear again.
Best solution here are the permanent ones but they come with some risks. Also a lot of doctors on realself claim that its difficult to get good results on acne scars with fat grafting.
Best results ive seen were done with silicone injections and they are permanent.