No, I mean he's the best option that could be available this summer. Messi and Mbappe are better, Martial and Dembele are younger, but they're not gettable. But Griezmann is worldclass, little doubt about it.
He's not an out-and-out striker, more like a 'false 9' that likes to drop to midfield, drift to the wings and engage in short passing combinations. I think he can play both as CF and inside forward. Very hard-working and suitable for pressing game. Very quick-thinking. Not a good dribbler. To put it simply, he's a more mature version of GJesus.
Not sure Guardiola is interested in a pure striker, his tactics demand more versatile attackers, hence City's attempts to get Sanchez. It's important for him to have forwards that can pass and create overloads in different parts of the pitch, not just wait for the ball to hit it.
Didn't try to analyze it using stats. But he plays in a team that doesn't create much and has learned to be pretty accurate with his shots. Has buried Pep's Bayern in 2016 CL semis.
Yes, their main penalty taker.
Here's a good analysis of Griezmann's strong points: