So we want to make the college football regular season even less meaningful now? The college football season is a playoff it always has been we don't need to expand anything at this point.
Wazzu fan here. I agree if you expand the playoff too much it makes the regular season less meaningful. However I think expanding it to 8 would actually make it more meaningful. If you expand to 8 then the conference champions of the power 5 conferences all automatically get in. This would mean that having a great regular (conference) season would become paramount. Ask Penn State if they think their regular season would have had more meaning if the playoff field was expanded to 8 teams.
Current system means some people locked in a room get to decide that even though you won a conference championship and defeated team X they can still put team X in the playoffs ahead of you. The idea of deciding it on the field was effectively killed when tOSU was named over Penn St. Expanding to 8 teams would, I think, revive it. 5 champions earn it on the field, some men locked in a room can decide the other 3.