I'm a little confused, but what exact information would you glean from a "Host Level" CPU Ready value? Even if you sum up CPU Ready times across all VM's on a host, I'm not sure you would get any actionable information, especially as you tried to compare that number across hosts in your environment. Maybe I'm missing something?
I found this whitepaper helpful: http://www.vkernel.com/files/docs/white-papers/demystifying-cpu-ready.pdf particularly this section:
Also, this thread on the VMware communities gives a similar sense: CPU Ready Per ESX Host | VMware Communities
Thank you, this was the exact information I needed to disprove a need for it. I hadn't really heard of monitoring this metric but a coworker insisted it was necessary to monitor.