As long as there are quite a few C teams out there, say 50+, I won't mind. To be honest, I don't think in 5 or 10 years there will be many "D" teams in real life. I think the athletes are just getting better and there are more good athletes that are forced down to the non-bcs schools because of scholarship limits.
I look at the MAC this year and it isn't that far behind the Big 10. Meaning, I think there are only 2 or 3 teams that could run the table in the MAC and I would bet that the bottom 4 teams or so wouldn't win a MAC title.
I still want to see 10 or so A to A+ teams, 30 or so Bto A- teams, 30 C+ to B- teams and 50 C or below, if we get that, I will be OK with it. When I was growing up, every major conference had a team in it that the top teams would beat 77-0 or so. I don't see that in the BCS conference anymore. It seems even the best teams are usually only 35 or so points better than the clowns in the league. So if thats the trend here, I'm ok with it. Hopefully there will still be some non-bcs teams to thrash though.