I am not planning to change the 10m strict system at this stage, mainly because it will no longer be required when Cataclysm is released (provided the Blizzard team stick to their current plans). I am the first to admit that the current system has some shortcomings - but there is no perfect solution given the limited info we can gleam from the wowarmory.
That being said, I am about to enable a GuildOx "10m Casual" ranking. Many guilds have slipped off the 10m strict charts but they would still like to see, roughly, how they would compete.
A sample of the new 10m Casual ranks can be seen at
10-man Progress - GuildOx - WoW Guild Progress, Character and Loot Rankings
How does it work?
It includes all guilds where their 10m world ranking is at least 5000 positions better than their 25m world ranking. All other guilds are excluded.
Will it replace 10m strict?
No, it is not designed to replace the 10m strict rankings. I do not plan to be offering banners or sigs for 10m casual, nor do I plan to list all achievements for the casual ranks. It serves as a very rough comparison for guilds that don't make the cut for 10m strict. In any case, it will also be obsolete when Cataclysm is released.