One of the things I am most excited for is allegedly coming online today when the servers go live. As an mmorpg player I love gear and class specializations, so if we can do that with guilds I'm going to love that too. These stats are just part one of guild specializations where more will come in the line of artifacts, castle bonuses etc. It is an opportunity for guilds to separate their identity even further and stand out more.
Of course this will be the bare bones introductory version that will be expanded on later, but I cannot wait.