It made it to the patch! I have not had a chance to test yet...
"Added the ability for EQ to set its affinity to all cores when starting up. This can be done by modifying the eqclient.ini value for the instance to -1. For example, to set your second instance of EQ to run on all cores add "CPUAffinity1=-1" to the [Defaults] section of eqclient.ini. Note: if this causes problems for you, please report the issue in /bug and change the CPUAffinity value back to the value it was before you changed it."