Complex sentence: These changes left the WAC's viability as a Division I football conference in doubt so the two remaining programs, New Mexico State and Idaho, began making plans to compete in future seasons as FBS Independents.
Split into simpler sentences: These changes left the WAC's viability as a Division I football conference. The two remaining football-playing members, New Mexico State and Idaho, began making plans to compete in future seasons as FBS Independents.