Agreed that spring has a lot of obstacles as well. I also agree any games will get big ratings, but a handful of teams playing, a champion does not make. Some mighty big possible downside on the other hand for schools that "opt-in", and it wouldn't be all the teams from the couple conferences that play.
When the Big 10 went all conference games the other confrences had hoped they would wait and hope for a drop, but they knew the writing was on the wall, and followed suit. Same here, they are hoping for a miracle, keeping hope as long as they can, trying to salvage some revenue.