The phrase "more doctrinal" refers to beliefs or teachings that are more centered on a specific doctrine or ideology. The antonym for this phrase would be "less doctrinal," indicating a reduced emphasis on such beliefs. Alternatively, one could use the antonym "exploratory," indicating a more open-minded and flexible approach to exploring different perspectives and ideas. Another antonym could be "eclectic," suggesting a wide-ranging, inclusive approach that draws on a variety of sources and beliefs. Ultimately, the antonym for "more doctrinal" depends on the context and the specific meaning the phrase is intended to convey.