However Martinez has been here 18 months and 3 windows and I've yet to see any kind of transfer nous from him. His 3 successful signings are 2 players who had already played for him and guy who stood out at the World Cup who any moron could tell was a class act.
I think you're being a bit harsh here.
It might not take transfer nous to realise someone like Lukaku is a great prospect, everyone could see that when he was West Brom, but it takes real management skill to put the case forward to convince a player like that to join our club. It makes me believe Martinez has the skill to convince top players to join us, and that's an exciting prospect. I don't believe many managers can do that.
Also, with transfer funds limited, it's not as easy as 'raiding la liga'. La liga doesn't necessarily have players who will adapt well to the premier league, they may be technical but prem is a tough physical league. Martinez has ensured the players he has signed will perform in this league.
It's also worth bearing in mind that Martinez saved up for Rom rather than buying several other players. He wanted the big transfer. It's debatable as to whether this was wise given the inbalance in the squad, but on the whole it gives us a top class centre forward, guaranteed goals and an investment, I think it was a good decision.
He has invested in youthful players who I think will be indispensable (they already are!), Rom, Mccarthy, Besic. All three make a big difference to our starting 11. I don't buy that besic was an obvious signing, he was a punt and I think he shows Martinez has an eye for a great player. I would add that Robles could turn out to be a good signing, or at least better than we had initially hoped!
I don't expect perfection in the transfer market with limited funds and such high competition. I think Martinez has done a sound job to date, I hope he builds on it.