Ineffective? At what?
He is light years ahead of Robinson at what we ask our strikers to do.
He has good positional awareness, good first touch, wins his fair share of headers for a small guy (he is 6ft) brings other players into play, scored a very good goal at Easter Road, all in a stop start season where he has been injured, moved his family over here from the other side of the world.
If you cant see a player in him I really do wonder what you expect for £300k!