Sorry Brucey, I reckon he is undeniably one of the best in the world right now and actually shows signs of continual improvement. Still young too.
He was excellent at Real Sociedad before his big move too. For the cup games at Camp Nou when there's not much of a crowd you can wander about to different parts of the ground. Watched most of Barça V Real Sociedad right by the touchline a couple of seasons back and as amazing as it was to see the technique of Messi, Iniesta and Alexis up close, Griezmann also stood out a mile and didn't look out of place in that company.
I don't doubt he's a decent player, but at Sociedad he averaged a goal every four games, and at Atletico he's by and large one every other game. He had a fantastic season last year, both with Atletico and France, but he hasn't hit the same heights in the league this season. For that kind of money I'd want him getting the kind of goals he scored last year every year. Compare him with Lewandowski, for instance, and he's nowhere near that level, yet he's attracting world record transfer fees? Sorry, but no.