Tez
Player Valuation: £8m
Allardyce has been superior to Koeman this season. What your figures don't show are that Koeman has games against Ruzomberok x 2, Split x 2 and Sunderland in the Cup boosting his numbers. Those games against awful opposition distorts it to looks like Koeman wasn't that bad when he was an absolute disgrace this season.
I would argue that if Koeman had Coleman available, Tosun and Walcott like Scam has then he'd have produced better than him.
By no metric could you say big undies has done a superior job to his predacessor.