1. guild crests.
I'm not sure if this is even possible to implement into the game or not, but maybe guilds should be able to make their own custom crests. they can make it after buying the accessory room, and the guildmaster can make or change the guild crest, or delegate a more artistic member to handle the design (the designs will have to be moderated of course), and setting the design will cost 30,000 cr (?) and members that are veteran and up can purchase one using 15,000 cr (?)

2. guild message boards.
I think this one will be easier to implement. sometimes there are lots of things I want to tell my guild, and the message of the day just isn't cutting it. sometimes there is just too much to say, and there is a frustrating limit on the MOTD length, so maybe there can be a guild message board system accessable by the guild terminal, where people can post messages, and have different sections for higher ranking members. only members can read posts in the member category let's say someone is veteran. he can read and make posts in the veteran category, the member category, and posts viewable to all members. there can also be an announcements tab that everyone can read, but is only posted on by officers and up. maybe there can also be a petition system on some posts.