First of all -- another multi game guild is in the House. CONGRATULATIONS for taking the splurge. A NEW D&D game is in town -- are you kidding me!? :)~~~~
Taking the leap you mean? We are about 2 years old with about 60+ members. (edit: Just recounted, growing fast)
We really only do BG3 but have dabbled in FromSoftware to pass the time. Sometimes we have movie nights, or Youtube Nights where everyone shows their favorite youtube clips, hilarious reviews of bad Steven Seagal Movies, and clips of comedians.
We don't do any other RPG's currently.
Quality over Quantity. Which rule do you think is "onerous?" Haven't heard that one before!

PS: That being said, we've tweaked our rules slightly over many years to ensure they are right where we want them, aka in the best interest of all of our guildies.
Also I should point out we have our own criteria for new members and guidelines for Multiplayer runs- see below for the Guidelines:
To be clear I found some of your Guidelines useful and even incorporated one into mine (the AFK thing).
Multiplayer Guidelines: Criteria for New members:1. Be inclusive of others. We have a zero tolerance policy for racism, homophobia, transphobia or ageist or abelist behavior.
2.
No Self Narration. 3. No abusive behavior towards other players.
4. Be generous and kind to others.
5. Have a good sense of humor about yourself.
These are suggested guidelines to make runs workable for long term play.1. Keep runs to under 5 hours per session. After 4-5 hours you are likely to encounter interruptions which will frustrate everyone, and people will start to get burned out and snippy.
2. Agree in advance that everyone is able and willing to continue the run for multiple sessions.
3. Create a team chat in discord – (everyone will need to friend each other, to facilitate communication on future scheduling) (In future this will be automatically handled by SESH bot)
4. Agree on a Playstyle/type of Run (Murderhobo, Serious, Iron-Man, Roleplay...)
Guidelines for Group Play – Character Creation1. Figure out in advance what everyone wants to be. If your character build idea has specific requirements (Volo’s Eye, Loviatars Blessing) and you are meta gaming make sure you discuss that in advance and agree on who gets what.
2. If you are Roleplaying, discuss that in advance and agree on how that is supposed to work. Best practice is to recruit the run as an RP run.
3. Try to aim for a balanced team.
Guidelines for Actual Play1. Don’t take anything out of another person’s inventory without asking.
2. Either agree on a leader or a method by which you determine what you are doing.
3.
Communicate but don’t self-narrate. Engage with your teammates, don’t just talk to yourself – you are not a streamer with an audience, you are a player on a team.4. Do not level another person's character without discussing with them first (In case of a DC).
5. Don't assume anyone else is meant to act as a support class for your build.
6. Let people know if you are going AFK and for how long as a courtesy.
7. Be excellent to each other - being kind to each other costs nothing!
As you can see we have some overlap. Although one that I don't have is anything about
Insubordination or
Humor. I like to think we are more democratic than that. That kind of terminology is a bit of a red flag for me, and I suspect younger folks may have a reaction formation to it. For us if the group has a problem with a player we will try to find a better 'type' of run for them and invite them to put together one of those.
It's why we have the Chaos run - for people who just like to get drunk and play like idiots.
One of ours that I would like to point out to you is the rule about Self-Narration. We have been running into this a lot lately, and our entire server is in agreement about how annoying and disruptive people that do that are and there is no reasoning with them. It's one of our few ABSOLUTE rules - no self-narration! We have a theory that it is tied to 'Streamer Culture' - the idea that you are there to game in front of a captive audience that can't really communicate with you. It's not something that can be captured on an application (which is why I don't do them). All of my Admins are aware to screen for this sort of thing before invites go out. Anyway, just a heads up, one GM to another.
Since Bg3 doesn't have a DM mode yet we don't have any hard rules for who is directing the Party and that is also a democratic process - not in the sense of what we do, but in who wants to take the lead on activities. (Because you generally do want someone providing direction)
Anyway, those two rules where the only ones that I thought were cause for concern. I guess I would be interested in what counts as Insubordination? Do you dictate classes and roles to people? If someone in the group is following their RP but is working somewhat counter to the group is that Insubordination? If a player is awkward (low charisma) and has a cheesy sense of humor is that a problem? When has this been an issue for you guys? Stories.
Also, in regards to
exploits, we allow them because we report them to Larian when we find them. I don't make rules about them because once someone tells me about one I report it. If I made rules about them they wouldn't tell me. See, I'm helping.