If I may jump in on this, I think the idea of there being a risk to backing him with players that fit his system is overplayed. People will reference the wbs, but they're basically just hard working wingers. Maybe you have to buy one or two more 10s than you would normally have, one or two more center backs. Otherwise in theory where's the risk? Will the 'next' manager not need a good center forward, a good center back, a good midfielder? Meanwhile if we look beyond positional attributes, look at the general attributes he requires - physical, hardworking, technically astute, good characters. Again, are these not attributes any manager would admire in the pl? Maybe if you want to go back to small, technical passers all over the pitch sure - but I sure fecking hoping we don't.
But all of this belies the point, which is, regardless of what system we're buying for, it doesn't matter if we don't buy a whole lot better overall than we have been doing the past decade. Buying a wb under Murtough/Woodwood would be a travesty regardless, because they would have been poorly scouted, overpaid and under nurtured, so when it came to selling them we either can't shift them or we end up taking a massive hit and then have less to reinvest. You would hope (and I really mean hope), that we're going to start doing better under the new management team. Younger, lower wages, lower fee, and thus a lot easier to shift if we need to, thus lowering the risk overall of backing any manager.
So in brief, the level of risk of backing Amorim has nothing to do with Amorim, and everything to do with whether we can start buying better.