I like the idea of having three set opponents every year and then rotating the other six regularly so that over a four-year span you play everyone in the league.
For Missouri, something like a four-team pod that includes Arkansas, Oklahoma and Texas ... or sub in Texas A&M. I have no idea if that's the approach the league will take. If not, I'd hope they'd move Missouri to the SEC West so it's more geographically sensible.
West: Missouri, Oklahoma, Texas, Texas A&M, Arkansas, LSU, Ole Miss, Mississippi State
East: Alabama, Auburn, Georgia, Florida, Tennessee, Kentucky, South Carolina, Vanderbilt