It's not steep at all. BUT at 22 he hasn't yet set the world on fire, 22 is not young for a footballer.
It's high risk, same as Gill @ £30m who failed to impress so far.
BTW it's £45m plus addons.
Fit what bill? Which issue can he solve? He ain't a striker, he isn't Kane replacement. Where does he fit?
He fits on the RW/F because Kulu doesn't have the pace to play that role based on performances so far this season.
Watching his vids - that seems to be his best position and somewhere he can contribute goals from.