I'm betting the cost of all children's networks bundled together do not even equal the cost of one RSN. That is why the drum beats hardest for sports. You save the most there.
Look at me, I have the welcome pack. The only pack without ESPN. Because of that my total cost (DVR fee included) is under what JUST THE PROGRAMMING costs from your theortical pack (don't forget a huge portion of the bill is distribution related, as satellites, uplinks, and "free" installation are not free).
The best world would be more like the Canadian system. Genera-centric packs. Add in a distribution component based on how many packs you have. You could have:
-A "Basic" pack (standbys like TNT, TBS, Syfy, Spike, AMC, and so on)
-A few sports packs (basic: ESPN, ESPN2, local RSNs; expanded: Versus, NFL, Tennis, out of market RSNs, etc.)
-A "Lifestyle" pack (Food, Cooking, HGTV, DIY, etc)
-A "Kids" pack (Nick, Cartoon, etc.)
-A "Classics" pack (TV Land, Hallmark, TCM, etc.)
-A "Learning" pack (Discovery, History, TLC, etc) (Yes, I know it is a joke to call these learning channels anymore)
-A "Womens" pack (Lifetime, We, Oxygen, etc.)
-A "Music/Reality" pack (MTV, CMT, Fox Reality, etc.)
-A "News" pack (CNN, Fox, MSNBC, HLN, Headline News, etc.)
and so on.
Channels still grouped together, but in a way we don't pay for the types of channels we never watch.