Bluetintedspecs
Player Valuation: £6m
When he left in 2013 we finished above them in the league. We were actually in a position of strength after years of building, and a few additions would have seen us top four.
Sadly Martinez squandered this legacy and then Moshiri came and and managed to make the team worse despite spending hundreds of millions in transfer fees.
Seven seasons ago we finished above an RS team that finished 7th. So what? No, we wouldn't have reached the top four if he'd stayed. We peaked in 2007/08 and 2008/09 with our highest points under Moyes, but we stagnated and started to decline a bit in the seasons after that. I think we, and he, had grown a bit stale and both needed a fresh start. His record since he left us has been dire, however you care to dress it up.
Also, you should never go back. Howard Kendall Mark 2 and 3 illustrates that. I can't think of any manager, apart from Mourinho, who had a successful return to a club as manager. If there were any, they were few and far between.