Given the amount we're paying him, 25-30 involvements in goals (i.e. goals + assists) should be the absolute minimum expectation. He's paid like one of the best players in the division - the expectation should be that he's playing like one.
As it was, his season's contribution was three assists - one against Charlton, two against Cheltenham. He doesn't offer you anything defensively, so his only contribution is making or scoring goals.
Now he's so far in arrears, the only way his wage becomes an "absolute steal" is if he tears up the division like noone has done before. I'm thinking 20 goals + 20 assists sort of territory, leading us to promotion. I won't be holding my breath.
I'll be cheering him on next season as long as he's putting the effort in. But even if he has a decent-to-good season next year, he's still been a massive waste of money for the club.