How many have worked out? I can only think of Coutinho and Sturridge. In comparison, I can name about 7 or 8 off the top of my head that haven't.
I think Coutinho and Sturridge gave the brass a really inflated idea of how effective this strategy is.
Assadi, Borini, Alberto, Aspas, Ilori, Ballotelli, Lambert, Markovic - All complete nonentities.
Allen and Mignolet have been ok, although Allen was overpriced and not really a 'value in the market deal' as much as a 'I want my man in'. Can looks like he can be actual value.
Not to mention all our loan signings have been utter duds. Zero value there.
Since Rodgers came in, I'd class only Sturridge, Coutinho and Sakho as good value, Can Moreno and Mignolet as potentially good and Allen and Lallana as overpriced but ok now they are here (Mignolet and Moreno probably should be in the ok category really).
Rafa got flack for his signings, but he got a lot more value out of his transfer policy.
It doesn't help that our bigger signings haven't been good either. Sakho, Lovren, Markovic, Lallana, Balotelli - One good signing, one ok, one who might come good and two utter duds. But hardly 100m worth of talent there.
So in short, we suck all over at transfers.