I am failing to understand what Dallas Baptist has to do with this discussion? I get DBU has a good baseball program, but they are basically an unknown outside of the collegiate baseball world, and are D-2 in all other sports.
If WSU wants to bring back football, and is willing to commit to a reasonable time in the MVFC, then there is no question they will bring added value and name recognition to the other teams, especially the ones who are "true" MVC members. Fans of all of the MVC schools recognize WSU has a fellow conference program. I really doubt many, especially outside of the die-hard baseball fans, realize there is even a Dallas Baptist, let alone that they are a conference foe.
DBU being D-2 in all sports except baseball brings up another question. I thought you had to have all your athletic programs in the same classification...ie you are D-1, D-2 etc...If that is not the case, what is stopping schools from parking some of their non-revenue programs like tennis at D-2 or D-3?