Fair points on Lambert - I always felt that he was always doomed at Villa, though. They spent far too much under O'Neill and didn't get continental qualification to justify the expense, and ever since they appointed McLeish they've felt like a club where the main priority was avoiding relegation rather than anything else. Lambert couldn't really spend much and had to, like Jackett to an extent, make the most of what was in the youth team to plug the gaps, and you never expect fantastic football from teams near the bottom of the PL tbh.
Maybe it has broken him, though. Managers to seem to have a best-by date.