Seems to me, Koeman has said it since before the end of the season, he wants players who can score, Klaasen can, i'm sure he wont be the last goal scoring type to be brought in.
That said i honestly don't know what position he will play in
Number 8 in a 4-3-3, thats what I suspect Ronny will favour.
6
8 - 8
7 ------- 11
9
8 - 8
7 ------- 11
9