You mean with the Montana schools, SDSU, and whoever wants to join.
2021 stadium capacity and listed REGULAR season attendance avg:
Wa Grizz: 25.2k/24,670
Bobcat: 20.8k/19,603
Dykhouse: 19.3k/14,166
Roos: 8.6k/6,191
EWU would need to at least double their stadium size, and increase their attendance by close to 250% to get to the 15k minimum for FBS..
FWIW
JMU/Bridgeforth 25k/21,769
JSU/Burgess-Snow 24k/16,809 (thats with a 5-6 record).
SHSU/Bowers 12.6k/7,283*
SHSU is from all 7 games, 2 playoff games only drug their avg down by about 100. They did have a neutral site vs SFA in Houston 25007. Regardless, SHSU has no business becoming the 11th FBS program in TX.