I had Hartline in a couple of FF football league and he was a bit of a disappointment from a FF aspect. In FF you like guys to have big games once in a while instead of being steady. Hartline because of his consistency would put up a few points each week but never seems to rack up a big score that can get you a win.
From a strictly football standpoint he is awesome, dependable and regularly productive, but with FF dominating peoples impressions this season has been lukewarm for him. Good "real life" season, so-so FF season. He's ranked 25-30 in my FF leagues which is middle of the pack, not bad, just not great.
As has been mentioned it's expected that white receivers be great - or be gone. So any white receiver not lighting it up can be expected to get criticism because surely there must be a black guy somewhere that is better.