Change in lookup valuesdoes not require a run of Load Data Warehouse - Full Load. An Incremental Load should be sufficient to update the Data Warehouse values.
Here is a list of actions that require a Full Load run of Data Warehouse:
Run this job with the Full Load option selected in the following cases: *You perform an upgrade or install a patch on CA PPM. *You add a new language in the data warehouse system options. Running an incremental load of this job does not update the data warehouse with the new language. *You delete an attribute or unselect the Include in the Data Warehouse option for the attribute in Studio. You cannot re-enable the attribute for inclusion in the data warehouse unless at least this job has completed one run. *You change the entity for fiscal periods in the data warehouse options. *You change the timeslice dates to include a larger timeframe. *You change the First Day of Work Week. *You change any of the settings in the System Options, Data Warehouse Options.