The underlined part is why the change did nothing to help small guilds, not any sore point that made it worse. It is unchanged from a system that was bad, That is all.
The bolded part is mathematically false. There is a point that renown intake will not match/overcome decay across many sizes, without a playstyle overhaul. A size range that this change reduces but still does not allow anyone below size 10 to progress any further than before. They are still artificially paused on a treadmill detour.