These are just a couple ideas i thought of i will prolly add more.
*Add a feature where guild masters can buy special fonts for their guild name.
*Add an xp bonus when doing full runs with only members from your guild.
*Add a guild bank for items to be donated and reused throughout the guild. (maybe not after officers in sl were ruining guilds.)
Thats all sofar. Let me know if you like or dislike my ideas.