Sarri has said that he doesn't like 3/5 ATB. I can't find the source, but I believe he was directly asked about it. Though, it should be said that we effectively do attack in a 343 diamond.
I'm starting to come around to the idea that Kante is kind of a rotation option right now. Against the bigger teams, no doubter. But against opposition that we need to break down, we may find that Kovacic and Barkley/RLC might be a better option.
Kante is the best midfield destroyer out there, but in a team that has the ball 60-70% of the time, that's less of a need. If he can start getting further up the pitch and doing his thing of winning the ball back, but in the final 3rd or opponents half, it should lead to a lot of goals. I'm hoping this happens.