I think that Kenedy looks a very good player, he is certainly not where Chelsea's problems lie. I watched the full Chelsea game yesterday and they look shot for whatever reason. Having a manager who blames everything and everyone rather than keeping quiet and resolving things internally will not be helping. They are ponderous at the back. Because of this there is a gap between their defence and midfield as the defence sits too deep. Mourinho tried to combat this by having Matic and Mikkel sitting but that gave them a total vulnerability out wide. They just have lost the solidity and don't seem to know how to combat it yet.
Kev looked very good I thought and we seem to have bought well this summer. He offers a directness that we do not have elsewhere in the squad and again that adds balance. I cannot think of an area of the team now that looks deficient. We will know more though when we play against the hard pressing game in the CL that we have previously really struggled against.