He has a lot of great attributes, at Southampton he was one of the best midfielders in the league.
-workrate
-stamina
-positioning
-guile
-aerial presence
-acceleration (this one has never been used properly for us, it's a shame)
are his greatest attributes for me. He's not great anywhere technically (ball control, passing, etc - except maybe striking, he used to score a lot of long-range screamers before Southampton got into the PL), but he's still very good everywhere without any big hole in his game.
His two big weaknesses have shown when he had to step up his game for us though, unfortunately :
- he is a bit spineless and crumbles under pressure
- his football intelligence and vision are average, he's no playmaker
Then again, i think these weaknesses have been exposed because we tried to mould him into something he's not meant to be.
We often talk about giving the offensive players some freedom so they can express their full potential (Pogba, Nani, etc), but i think the same argument can be made for some of the more defensive players. Schneiderlin will shine if he gets the freedom and opportunity to roam all over the pitch and just tackle everyone, like Kanté did for Leicester last year. Give him a specific role and responsibilities, he will fade. That's how i see it.