The esmf_logging option in nuopc.runconfig is not working since the esmf logging is controlled by drv_in using create_esmf_pet_files namelist option (in CMEPS driver code). So, I am not sure but maybe there is no need to expose ESMF_LOGFILE_KIND in the cmeps/cime_config/namelist_definition_drv.xml file. I think CMEPS driver is not looking to it instead of it is looking to the drv_in and this information only meaningful to the driver.
The esmf_logging option in nuopc.runconfig is not working since the esmf logging is controlled by drv_in using create_esmf_pet_files namelist option (in CMEPS driver code). So, I am not sure but maybe there is no need to expose ESMF_LOGFILE_KIND in the cmeps/cime_config/namelist_definition_drv.xml file. I think CMEPS driver is not looking to it instead of it is looking to the drv_in and this information only meaningful to the driver.