Without a guild organization or communication tool like guild email or message of the day in guild chat, it is literally impossible to communicate with everyone in the guild about events or news besides pointing them to a website.
Please implement guild communication tools to help the leaders organize there groups. We shouldnt have to rely on a separate website that not all players use to organize.
I know this is another thing to add to the hundreds of things that should already be in game after a year but it needs to be done.