Lescott, Baines, Arteta, Jagielka, Coleman, Mirallas, Pienaar have all been good enough to play at top four level after being bought by Moyes. All were bought for less than 7 million as well, you will have to show me where Kev's 8 million transfer fee has been confirmed.
McCarthy was a good buy and he is top four quality. Lukaku looks like he has the potential to get to top 4 standard, and we have paid the price for his potential. But his other signings have been of lower mid table standard, and I don't think he is going to be anywhere near as good as Moyes in getting top four quality players at value prices.
Instead, I think he has a propensity to get a hard on over players that are average at best, and then tell us all that they are phenomenal. I bet you we ignore the likes of Delph and sign the likes of Cleverly.