Enoach's point is valid that the small guld bonus should be part of the equation. If you multiply # of players * guild bonus it gets you to the effective renown earning power of a guild
Here is a slight tweak that takes this into account. This is based on the old system. In all cases the decay is less than or equal to what is proposed in the test system:
For guilds with 90 or more accounts this would match the test method
For guilds with <90 accounts, they would see a reduction in decay such that decay is reduced by ~ 80% for all guilds. In all cases they would get less decay than the test method.
Here is the impact for some various guild sizes. The # in parenthes takes into account the guild bonus and the reduction in renown required by the guild. The proposed system column is what I am proposing as an alternative to the test system. The test system based benefits solely on size - bigger is better.
If the guild bonus curve is flattened so that all guilds size 1-12 get a 200% bonus rather than bell curve centered around 6 members, the decay chart would like this:
Again the goal of this would be to help out small casual guilds that stand in place get the same type of benefit large casual guilds received, but all guilds would benefit relative to the old system. The key is evening out the punitive decay aspect of the guild system and not the leveling aspect.
I am not sure if the devs will even see this, but if they do I hope they consider this system or something similar as an alternative that recognizes that small casual guilds also need some help. I believe small guilds have a place in ddo and am hopeful Turbine believes that also.
It would be great if they lowered ship and amenity requirements by 15-20 levels as well since that is what most people care about more than the level itself.