IDK who is the next Fofana but I would go fishing in the same waters he was found...Italy wouldn't be my first port of call.
We've bought plenty of duds from the French and Dutch leagues, as have others in the league. So it's not a simple case of where you buy from. Our Serie A rejects have done pretty well.
..as I have said before and am proven correct almost every window, there will be a better player transferred to some other team for less than we paid for whomever we brought in. The point? Well, it's not to say that Bissouma is shit or it was a bad deal. He isn't and it wasn't. It is to say that there is value (low price, high quality) in the market but we are incapable of capitalizing on it.
I get what you're saying, there's always a hidden gem, or even not so hidden gem that another team has picked up for a negligible fraction of what we typically pay. We can do better on that front.
However, for every Caicedo, there's a Jahanbaksh. Brighton also get by with a player like Trossard who can't hit a barn door most weeks. Until the recent sales of White, Bissouma and Cucurella, Brighton were actually badly floundering in the transfer market. They had one of the highest net spend in the league, even higher than ours actually. They've failed to find a top striker for years now.
Look at Brighton and Caicedo...is he as good as Bissouma right now? No, but even in our great deal for Bissouma he was 4x the price and though I expect him to do well here he is not 4x the player that Caicedo looks to be...value.
The difference between Bissouma and Caicedo is that Caicedo may well have flopped like Jahabaksh, but Bissouma is about as proven as it gets. As you said yourself, Bissouma right now is better than Caicedo. That makes him worth the extra we paid.
The price of players does not scale linearly with their quality. The price goes up faster than quality, cos at the top end the supply is very limited. There are only 3 DMs in the league that are outright better than Bissouma, two of them would never consider us, the other would cost 4x what we paid for Bissouma.
And we are building a team NOT adding the finishing touches which makes it a slight difference to where City and Liverpool are. The finihsing touches were needed during Poch's years. Now the team needed too much. An identity needed to be forged before you can decide what final touches are needed.
Since Biss, Spence, Richy etc haven't played much for us yet, the rebuild can't be declared a success. However, the team has evolved rapidly since Conte came in. Our front 3 is nearly perfect. Our midfield is not elite but effective. Romero has proved to be elite. We have a respectable bit of depth too.
We DO have an identity. We counter attack against the top 2, otherwise we're a mid-block, medium possession side. We have the goal-scoring WBs, roaming wide CBs, workhorse CMs. It's a defined style which is proving to be quite effective.
I really don't see what else we can do to improve this team other than getting an elite LCB, RWB, and perhaps an elite CM.