I doubt that would happen, anymore than we'll see a splitting of the breed in English Setters, Golden Retrievers, or numerous other breeds where competitors have bred for specific features that they feel best represent the breed or which best fulfill their performance requirements, resulting in wildly different structures/coat length, etc. There are extremes on both the show and field sides.
I don't think the field people felt "put-upon" the last time the standard was revised. The LRC, Inc. was mostly (and largely remains) field people, and the changes that were made the last time were likely intended to benefit the "American" or more fieldy-type Lab over dogs being produced from imported English conformation lines at the time.