Emery didn't really want Ramsey there either, but that's quite irrelevant any way - there's no comparison between the two.
Lacazette's passing is very average, he takes too many touches of the ball when it comes into feet, he doesn't have the capacity to make endless runs, his vision is limited, doesn't see more than one move ahead. Just a thoroughly average player really.
He's got good balance and has a decent shot on him. He's basically Giroud Mk.II and that's not something I would ever want to see given a creative licence.