Your hairline looks superb bro. I too am a perfectionist and tend to be hyper-critical, so I totally get where you're coming from, but from these pics it looks solid.
Who was your HT Doc?
There was this one thread on here, I believe by someone who had their HT done by Feller, who wasn't satisfied at 12 months. So he went back to his Doc and the doc told him to wait 18 months before making and decisions. He even posted pics at 12 months and it looked like it could have def been denser. But he posted again at 18 months and it looked beautiful. Totally filled in and natural. I don't remember the thread name, but if you do some digging I'm sure you could find it.
Cheers