This is the reason developers ultimately made the change, but there were many complaints about the decay issue that had nothing to do with kicking out people. Most guilds never did this and complained about being stuck. As a result of being stuck some large guilds changed how they operated just as some small guilds change how they operate now to deal with decay.
Our guild is doing just fine the way it is now. I took some good advice and it worked. What you are suggesting really isn't helping because there are no problems with the guilds' activity level or the what people in the guild are doing. I will never ask anyone in the guild to change how they run quests for guild renown optimization.
I am glad large guilds were helped, but unfortunately guilds of 10 or less are now worse off than they were before the change while it's significantly easier for large guilds.
We do need an adjustment and I am hopeful we will see one soon. I think lowering the fixed account multipler from 20 to 10 would be a great short-term solution.