I believe the current plan is to keep the schools as 5A. Next fall a new high school - Memorial - will open to relieve Heritage, Wakeland, & Lone Star. Each would likely be 6A otherwise. Memorial was supposed to open this fall but was delayed due to budget issues.
Centennial's former assistant director is the new head director at Frisco Lebanon Trail. They do seem to have a softer style. They were heavy with seniors last year and have endured major rezoning twice in the last 3 years - 2014 with the opening of Independence and again in 2016 with the opening of Lebanon Trail. I could be wrong but my impression is they perhaps are a younger group this season.