Losing Schneiderlin will always be a factor, but we played well without him plenty of times last season.
For me at the moment it looks like we're missing a bit of confidence and belief in ourselves as much as anything; players like Bertrand, Forster & Alderweireld Champions League level experience, used to winning regularly. Plus long-standing, regular members of the team in Schneiderlin and Clyne. That's going to take time for the side to settle.