SMP for my FUE scar/over harvested donor area? (Photo)

I got an FUE hair transplant a year ago and they overharvested my donor area. I am curious if SMP would be a good way to camouflage it. I typically like to get a 1 guard faded up to a 2 on the sides, but I typically get a haircut every 3-4 weeks. In the photo it’s been 4 weeks since my last haircut with the 1 faded up to the 2 guard. My concern with SMP is that I hear it doesn’t look good when the hair grows out. Thought if I just do it on the donor area? Also, what are other long term cons?