I'm having some trouble determining if this would be a huge issue for players or not.
The origins of the problem: the chat bar. I want to reskin it, but I don't want to stick to pointy edges, I want them rounded. This is not possible by just modifying the default chat bar, because the background color of a GuiTextEditCtrl can not be included with the image (
feature request). This means I would have to create my own chat bar, which removes the default toguild and toall functionality. Alongside this change I would code a slash command which would basically work the same, but the guild messages would be shown in a message system similar to GK's.
The question is, would this be a big issue for you, as a player?