In a converse sense, I think the best strategy going forward is to have Walsh slowly adding unknown names that the footballing world haven't really heard of. The sorts of names all of us as fans will be moaning about "who are they?" Lads like Gana are a prime example of this. Very few people were happy with this, I was lukewarm and I'm a generally positive guy! What needs to happen for me, is Walsh needs to sign players we haven't heard of, so we jump ahead of other Premier league teams. I do think that will happen increasingly.
Koeman has had a big input on Schneiderlin, Williams & Bolasie (you can add Sigurdson, and Fonte to that list as well) but I do think his input on signings will decline as he spends longer in the job. The contacts he has built up will lesson and players he previously worked with or against will become more distant. I don't begrudge paying the inflated fees for them being at English clubs as a short term fix, but on the proviso that it's not a long term model.
That being said, of all the players we've been linked with in that grouping, I think Schneiderlin represents by far and away the best value. You don't fancy him, which is fair enough but I think he's very good and will improve our first 11.