This was the poorly constructed 2019 grouping:
As you mentioned - a LOT of fluctuation in the Southwest corner of the state.
Brown County (2A), Pike Central (2A), and Sullivan (2A) as well as Washington (4A) are no longer in 3A.
Brownstown and Salem (Both 2A) and Bosse & Charlestown (4A) are also out of the mix.
There would need to be some serious rationalizing to put a West Vigo, Owen Valley, or Corydon in place of the 8 schools that would make up the SW Indiana 3A Sectional.