In my opinion, to recreate Conceicao's play you would have just to tweak some stats:
TEC: 82 to 84 - He did possess a good, even if not outstanding, first touch. Clearly deserving the update.
ACC: 86 to 88 - Monstrous quick bursts he used to did. He could reach high speed but was clearly on the early stage of the run he gained advantage. And this was crucial to his game, putting him on a very high class of player that was that Lazio serie A winner.
BB: 79 to 83 - You see, here is where he deserves really more. He was strong, very strong for a midget. And on his style of play, he didn't evade tackles or messing around (button X). Alas, his typical move was to gain, with accelaration, the space and when doing that it was natural to have a shoulder vs shoulder clash (a la maradona way, the clash, not the technique) which he never quit and endured because he was really fit and driven. And since that strong driven mentality was highlighted on his attacking dribbles and not particulary on the defence timing, I believe it should be portrayed on the BB parameter rather than the MEN one.
I am CLASSICAL (but I can't recover my account - don't delete Rijkaard, Ruggeri, Littbarski or any of the 5 Violins, you bastards!)