Control room and IR reverb issues

Hi all,

I am using Freeverb3 to run latency free room correction impulse responses in Cubase 7 control room because Reverence was not handling the IR’s generated by Room EQ Wizard correctly. For some reason the stereo image was being narrowed via Reverance.

However in Cubase 7 contol room FX rack, freeverb3 is overloading my i7-3930k CPU.
If I open the same plugin in a mixer chanel there is no such problem…hardly any CPU usage and no cracking up.

Any ideas on why it only causes problems in control room with Freeverb3?
Any ideas on how to import stereo impulses created by Room Eq Wizard into Reverance so they operate in full stereo?