By having a 4 or 8 team Playoff I've tuned off. Watching these games is of no value or interest to me because my team has never had the opportunity to even compete for a berth. It has no interest to me at all. The bowl games are already being termed useless money losers. TV viewing and attendance is dramatically down. The 4 or even the possible 8 game playoff has eliminated the interest for more than half of the football watching population (no statistics to back it up, just a feeling).
As for myself, I would be very interested in a playoff system were every team has a pathway to the National Championship. I would like to see a 16 team playoff where every FBS conference champion (10) gets a berth plus 6 at large bids. I believe a playoff of this nature would increase interest and revenue for all. Even the greedy P5 cartel.