True Gabby was a prolific goal scorer, but he was used as a winger for virtually all of last season, scoring 1 in 8 in the Premier League, and for the start of this, so expecting him to fit nicely back into a striker role may not be he easy answer to all our questions.
That said, the main benefit of him playing compared to Bent, is that at least he will drop into midfield to pick the ball up.