Very true. But in reality, how many people actually go out of their way to purchase K fares and above on average? Unless it's close to last minute, which most G is either sucked up or gone away by that point as well.

For most of my travel I usually grab L,T,U fares; unless for specific purposes of using miles to secure transcon upgrades. I bet, well hope; that it won't affect G available that much. People who still don't know, or understand won't use the online function any more than someone who has to call in.