GE should really just be renamed 'Masque of the Red Death' because that's what it is. The teams been incredibly lenient to some GE characters, my own included. The source book is ancient and shows with how it views certain topics IE islam/Muslims. I'm not 100%, but I believe making a flat 'earth' character is not allowed but don't quote me on that. The option for anyone wanting to make a earth equivalent character is MotRD.
The issue stems with how the mechanics in this setting work. One example mentioned in the thread is that christianity is labelled as 'all good alignments' whereas the Islamic faith is viewed as 'All lawful alignments'. A statement like that is one of the 'problematic' issues people are having with the setting. It's one example, I don't have them all because I don't know MotRD but I hope you can see the issues people from various cultures and walks of life would take with that. Because unlike with say; Vistani, Falks etc, people can at least point to them and say: 'oh, it's an analog of this culture, but it's still different. cool cool. This one however is straight up saying: Christianity good, Muslims might be bad. It's offensive on a real world level.
My take. Banning GE is just unfair to any current GE players who, as EO has already stated majority are great at roleplaying their characters. Grandfathering GE would not be a terrible idea, nor would making them be Application only. The issue with it being an app is once again, how many people it takes to vote on an app and how long it takes to get everyone to vote on it. It would work, but at what cost? I think personally if we intend to still use 'GE', it should be renamed in the game to 'Masque of the Red Death' instead and clear expectations need to be placed on it. Furthermore it would require the devs and dms to sit down with this book in their laps and edit the things that are a problem. Which, from what I'm told, is a lot. Perhaps if someone from the community would like to step up and do that work it might speed things up?