I don't know if there's a topic on that or not but can we have doors added to the guild expansion where certain ranks in the guild are allowed to pass through. Sorta like the doors in Moorcroft and Emberlight. (Guild ranks though, like member, veteran, officer, etc not prestige or tier rank)That way you don't get certain people using your mist wells and stuff without permission and what not.
Second suggestion is a guild arsenal. Knights had an armory for weapons before going into battle. It would be nice if you can add an "armory room" which houses guild weapons designed for PVP and PVE. Weapons that expire every 12 hours and respawn every 12 hours that can't be traded or sold. Depending on how the armory is upgraded determines the result of the weapon. Guild emblems and flags would be nice. About 20 premade guild images that guilds can select as their guild logos and crests. Since knights have a personal color allow guilds to have a personal color too so they can they can the color of the emblem, flags, and certain furniture.
The first section is a closed subject. It's in development already, as stated by Nick in the Update Discussion thread.
The second doesn't sound so bad, but I doubt the 'armoury will be implemented. If I'm thinking what you're thinking, it'll allow much easier weapon choice for newer players, resulting in less ce spent overall.
A guild colour IMO would be useless. Like, totally useless. Think about it for a minute.
No problem with the emblems though.