The problem is it will vary greatly for everyone. A family of four will probably need some of everything and the current bundling probably satisfies that as opposed to ala cart.
Personally, we watch about 4 channels regularly at any one time depending on the time of the year. During football season, ESPN, ESPN 2, NFL, FSN will get viewed, the rest of the year hardly ever. When Speed becomes FS1, it will probably be viewed as some Big 12 football will be there instead of FX this year.
TNT, USA, History and A/E are only viewed for about 6-10 weeks at a time depending on which series are in new seasons. BBC America is probably the only channel that gets viewed year round and possibly HGTV, but it is more background just to have something on.