TUG thinks that all too often guilds come about mostly so you can have a name and a chat channel all to yourself. Which is why the latest design post about the game explains that the designers want to remove that sense of artificially created communities. To strengthen that sense of forming player groups, guilds have to go.
As the post explains, too often guilds become things formed for the purpose of having a guild, placing an artificial limitation on what groups players belong to. Instead, the goal is to get players to form societies and groups organically, creating more freedom by removing arbitrary restrictions. It's an idea with a lot of promise, and as the game's Kickstarter continues you can decide if that promise is something you feel like supporting.