I would have thought Benitez knows that he needs to bring in quite a bit more quality in the summer if Newcastle aren't to be the relegation strugglers that they tended to be for a few years before they eventually went down - they've lost games to sides that they should have been swatting aside this season (e.g. Blackburn twice), and I think their overall record this season flatters them.
As for last night's game, I think Lawnmower got it right - although I'd say it was a little harsh of him to say Harris was poor when he spent so little time on the pitch.