It's not so much who he's managed to secure personnel wise, it's issues concerning his performance in the future - will he be able to obtain good value for players? Can he be as decisive as his role demands? The general consensus is that since his appointment the club have overpaid for what they have acquired (wouldn't necessarily agree with this, personally think it's been a bit of a mixed bag). I know often it is said that United are expected to pay a premium when it comes to buying players but this is when the Chief Executive should excel - I want Woodward to be perceived as a tough negotiator so when other clubs are contacted about their players' availability they don't add another £10 m to their realistic price tag. Furthermore, his perception from the window before the 13/14 season was that he can be quite indecisive. I was fuming when it went down to the wire and the club ended up paying over the odds for Fellaini. It gave out an unprofessional image, was a poor deal financially, and gave off the wrong impression to the player (metaphorically conveyed that he was a last minute back up). But he's done a good job in redeeming himself this summer.
1 bad summer, 1 good summer, hence why the jury is still out.