3A to 4A, they would still posssible only have 4 regional teams on schedule. Last time Alcoa voluntarily announced they were moving up, half the teams in the purposed region moved up to 5A.
Out of Region teams on the schedule this year:
6A Ravenwood, 6A Bearden, 4A Greeneville, 5A West, 6A Maryville.
That's 5 out of region teams signed.
The REAL problem is TSSAA has allowed Region 2, 3A teams easy access to move to other regions, leaving region 2 with 5 teams total. Several years ago, North View and Gatlinburg Pitman moved out. Then Union County moved in, but Loudon was allowed to move out. My thought is It would be absolutely no difference for Alcoa in 4A or 5A, when teams do not want to play them.