I am just saying we can buy everything else with gems, let us expand guild slots. It doesn't hurt a thing and allows people to join different communities with different ambitions and rules. For example... If I was heavily involved with a large guild that claimed 4 guild slots to manage and was family friendly, maybe id also want to join a branch of a large adult guild to chill with. Without a 6th slot I wouldn't be able to do that.
Now I get what you mean by using Discord and we do... however the advantage of 4 shared guild halls and having everyone in game with the same guild tag as a community is the goal.