First off Sissoko is not shit, but at £30 million, regardless of the market, it is fair to have doubts. I am convinced Poch could get something out of him, but is there enough there to warrant this type of buy? I also think that well he is pretty versatile, he doesn't have the qualities that we are truly lacking, either pace/the ability to take people on, or the ability to take over Eriksen's role if needed.
If £30 million is actually possible take it all and dump it on the table at Schalke for Meyer. He is everything that the Poch regime cries out for, young, pace, with potential world class skill. I don't think they could say no to that type of money and given the market prices these days, £30-£35 million would not freak out supporters or cripple the club financially.
Everyone freaked at Martial for £36 million last summer and now it seems like a bargain. If we want a "star" buy, our only chance is to catch them on the way up. As much as I would love Isco, once they get to RM, or Barca, they are likely out of our grasp.