Gary Neville's become a parody of himself. Also now a failed manager - the football equivalent of being caught masterbating in public, can never quite look at him the same way.
The softly-spoken Jermaine Jenas is underrated. Clarridge is good too.
Merse and Wrighty are good value for the s**ts and giggles, though Wrighty is also now a bit more informed.
Hoddle is better in the studio than co-commentating.
Martin O'Neill is excellent, though clearly in love with himself. By contrast, Niall Quinn is/was a complete simpleton who'd jump off a cliff if you asked him - given how he impressionable he was as a pundit.
In general, though, the standard of football punditry is p*ss poor compared to other sports -and ex-professionals don't bring more to the table than informed journos/fans, except visibility.