There should be a property in the prpcServiceUtils.properties file that can exclude schema changes when executing the export command of prpcserviceutils, but it was mistakenly removed. BUG-312343 has been created to fix this issue.
Meanwhile you can just add import.bypass.schema=true in prpcServiceUtils.properties file manually and it should just work.
There does not appear to be a way to exclude schema changes from the command line using prpcServiceUtils to import or export. Only option seems to be to not include them in the product rule and then export.