To be quite honest there is absolutely no point in going over Rodger' transfer record because opinions vary on the players' performances to date with IMO only Aspas and Assiadi as failures and a less than 25% failure rate is pretty damn good for PL managers ! Ilori, Alberto and Borini were quite obviously Moneyball signings with the hallmarks of FSG stamped all over them, so I'm not sure how much involvement Rodgers had in those transfers (certainly I very much doubt that Rodgers alone made the decisions) and whether they were good buys or not remains to be seen. All of the other buys are a success to varying degrees, some spectacular.
We are now into a different ballpark. You can probably add 10m to the quality of the players for the first team that we are looking at now compared to a season or so ago. This means we can target players just about to enter their prime years not just those full of potential. Whether we like it or not I'm pretty sure that this window will be far more of a 'Rodgers' window with possibly a couple more FSG Moneyball transfers thrown in (Emre Can fits that bill).
IMO all the signings from the first summer were Rodgers', with the exception of Assaidi, who I think was probably forced upon him. I think it was only after that that the transfer committee was formed and he lost some of that initial power. Whether it was in effect before the Sturridge and Coutinho signings I'm not sure, but I think it's plausible that it wasn't. I'm damn sure things had changed by last summer though: the types of signings we were going after changed markedly. So I make the players BR has signed and targeted with us as the following:
Borini
Allen
Sigurdsson
Dempsey
Ashley Williams
Walcott
Coutinho
Sturridge
IMO the only one of those that shows any kind of inspiration is Coutinho. Sturridge and Walcott were both good players who'd slightly under-achieved at big clubs and ones you could see the sense in gambling on. But they were well-known PL players and if you're relying on that level of scouting to pick up value then you'll soon run out of luck, because there simply aren't many cheap and excellent players in major leagues hidden right in plain view. To some extent we got lucky with Sturridge, in that it's not a signing you could readily replicate: an outlier, like GH nabbing Hyypia all those years ago.
Borini IMO is not good enough and was a bad call, made worse by the reliance on BR's previous knowledge of him, which firstly calls into question his ability to judge whether a player can step up to the right level, and also reveals a weakness for having to rely on old players, which I'm not keen on because it suggests a lack of knowledge of the market.
Allen was overpriced and IMO not a priority, and is still not obviously fitting into our first team. Again with the previous connection. Not a failure, but hardly a great success either.
Sigurdsson another he'd worked with previously, and again highly questionable whether he's good enough.
Dempsey and Williams surely need no further comment.
It's a relatively small sample, especially considering his last 2 signings/targets were fantastic successes, so who knows whether a lot of that was a result of him learning and having more time to build contacts etc.
But as of now, and based on what I consider the relevant examples, it's quite a mediocre record.