As the leader of a small guild (necessarily small - limited to people I trust not to teach my young gamer new language) it's already darn hard to advance. We've been working hard for over half a year and we still can't buy guild potions.
If a change that "cracks down on" small guilds is given serious consideration, please also consider making it apply only to guilds over level 50 or 75 or something. Small casual guilds already work really hard to get to even the modest guild rewards.