1) i think a guild bank, where everyone can throw in their mats and access them at any time would be beneficial, and give an actual reason to be in a guild.
2) also being able to trade weapons amung guild members without unbinding them, or making a guild bind option that you can buy to "unbind" your items at a cheaper price than regular unbind.
3) lasty a guild board. like a big blackboard for the guild hall, where guild members can post boss run times, guild announcements or what recipes they need. a select/copy option would be good.
these were within the first 10 pages of searching "guild suggestions"
i'm not trying to troll or anything but the topic of guild improvement does come up a lot
http://forums.spiralknights.com/en/node/17744
http://forums.spiralknights.com/en/node/18158
http://forums.spiralknights.com/en/node/2538
>>> http://forums.spiralknights.com/en/node/15207 <<<
http://forums.spiralknights.com/en/node/13880
http://forums.spiralknights.com/en/node/16207
http://forums.spiralknights.com/en/node/14557
http://forums.spiralknights.com/en/node/10527
http://forums.spiralknights.com/en/node/17691
http://forums.spiralknights.com/en/node/9999
http://forums.spiralknights.com/en/node/17029
http://forums.spiralknights.com/en/node/11265
http://forums.spiralknights.com/en/node/10832
http://forums.spiralknights.com/en/node/15707
i wish they would sticky a guild suggestion thread