Very high CPU usage and bandwith 1.5.1

I was using version 1.4 and it was killing my cpu (8gb RAM, 4 cores) which was sitting at 99% all the time. I decided to go for v1.5.2 which is now live and watched the stats. CPU lowered a bit with spikes that go to 100% often but an increase of 40mb/s in bandwith. I have 79 servers managed in rancher and each of them is running 4 containers.

Is this normal? 46mb/s seems quite high. And I have 150 more servers to migrate over to rancher. A server upgrade will be performed of course but man…the bandwith of this thing.