It is definitely going to take time for the new system to bed in. We shouldn't expect any different and I definitely think we will have a mixed bag of results initially. Look at Conte's first season and we started the same way. 3 wins, then 2 big defeats before the system was changed and we then started to find some rhythm.
My biggest concern is the lack of an obvious goal scorer at the moment. Hopefully Morata will find his confidence but we may end up having to invest in another striker if that doesn't work out. Until then we are going to be reliant on goals from the wings/midfield. For that reason I cannot see us challenging for the league title this season. Hopefully we can at least keep in the mix for top 4, and stay in the cups.