The short answer is - not necessarily, at his position. The template is there with guys who are great at rolling to the basket, sprint rim to rim, and can protect the rim defensively. Clint Capela is the mold. Willie Cauley Stein, Mitchell Robinson, Deandre Jordan, Dwight Howard. Adams, Thompson, Zubac etc. Anybody who tells you he can't fit in a modern NBA just simply isn't watching the NBA. Kofi fits - especially if he shoots free throws.
In regards to where he slots in the draft; who knows. But this idea that every center needs to be a euro big just simply isn't true. Same applies to Ayo as it relates to his "PG" skillset. So long as you can put the ball in the basket and defend your position, there's a place for you in the league. There's a list of comparisons for both.
Yup. An NBA exec last year was a color commentator for a scrimmage at the combine and was discussing this very topic. He said something along the lines of “If you’re not offensively skilled as a 5 in the NBA, you make your money by running the floor, rebounding & dunking everything in sight.” Kofi has the physical gifts. Also has good mechanics on his shot, so I wouldn’t be surprised if he can be a reliable mid-range shooter in a couple years.