Sissoko gets shifted out wide as well imo. Long term solution is get better defenders so our midfielders don't have to cover. Short term, its a bit more complicated. Changing the system would be ideal where we have both Melo and Mommo infront of the defense but if we don't have the adequate attacking wingers then we will be stuck with the same problem. I would go for that but I'm just saying its not as simple as everyone explains it.
On the other hand, I think you missed my point here mate. Sissoko didn't forget how to make the simple passes that he always did (just a few weeks back he had a good game against the Viola). If he could do that then there are no issues imo because we need him to retrieve the ball and provide the simple passes. That is his main job anything more is a bonus. I guess it all depends on your definition of complete passes. Just like its not Gigi's job to save penalties, its a bonus if he does. The responsibility is mostly on the kick taker rather than the keeper.
What I saw happening in the past games with sissoko is that we are asking him to make the difficult passes ( remember I didn't see the Samp game, just talking about the previous games), so the guy will naturally make mistakes because its not his strong point.