I agree that playing in the Playoffs won't, necessarily, improve any of the programs in the conference. The conference, itself, has more sayso on the quality of the programs improving than the impact of participating in the playoffs does, and it can do this by making a committment to do so. The nine-game mandate hurts the conference moreso with respect to improving its quality of play than not participating in the playoffs does, and will continue to do so unless the conference, as a whole, makes an substantial committment in effort and dollars to improve it in each of its member schools' programs.
Improving the quality of play comes in the regular season and occurs when one plays other schools that have good or outstanding programs. We can't expect to have much or consistent success against good programs in a playoff situation when, first, we have to improve the quality of play in the conference to a level where all of our teams play high level competitive football each weekend (particularly conference games), and second, we each don't play enough high level non-conference competition during the regular season. Both of these are required in order to achieve any serious and consistent playoff success.
That said, I still don't and won't advocate SU's participation in the playoffs under its current setup. And finally, the SCG's slow death and/or demise will result from the nine-game mandate moreso than from not participating in the playoffs or anything else. The mandate is a very bad decision. It limits the number of opportunities to play good non-conference programs during the regular season, some of the same types of programs that a school might possibly meet in some type of post-season setup (championship, bowl, or playoffs). The council of presidents should commit to improving the programs at all of the schools in the conference to make them consistently competetive regardless of who the competition is (conference and non-conference) before setting any future direction with respect to SCG, Bowl game type setups in the post-season, or member school participation in the playoffs.
Regards.