There are only two parameter available (-r|-R) for pattern search which return by default ok if matched and critical if not (as long as there is no --invert-regex param given). Some new parameters like -wr and -wR would be nice to do the same like -r or -R but will return warning instead of critical.
As soon as both parameters would be given --invert-regex would be set by default and if both regex for warning and critical would match, critical would be returned.