I feel that the unique rebel-encouraging gameplay on our JB is the 'spirit' of the server that we've honored for many, many years now. That gameplay is primarily driven by the rules we have in place for both guards and prisoners. Any changes to those rules over the years have generally been subtle, enhancements, or new additions based on the introduction of new plugins (LRs), but the common denominator with those changes were that they embraced the spirit of the server.
Allowing CTs to force deathgames, making them non-optional to prisoners when they were always optional beforehand, is a good example of a change made in the past that had a major impact on that spirit because it moved the gameplay away from being rebel-encouraging. In the end, it didn't work out because our JB felt like a completely different server, so the change was ultimately reverted.
Now, looking at your OP @leo, you bring up a couple suggestions that imo would change the spirit of our JB server: removing warning shots and force deathgames (increased round time suggestion tags to this). The warn-kick-ban suggestion is already covered by our admin protocol and the chat-filter suggestion would not prevent players from trying to skirt around our racism rule (which players already try to do regularly).
As for repeat maps, the maps played on our server are the vessel of its spirit. In other words, certain maps are nominated/voted, or even on the server in the first place over others because they are better suited for the gameplay dictated by our rules. So maps that are generally huge and host a plethora of deathgames will not be as popular as maps that are simple, convenient, and straight-forward with less focus on deathgame activities.
That leaves us with warden, a CT queue system, and comm restrictions. These 3 suggestions/topics have the potential to impact the spirit of our server, but could also bring enhancements to facilitate the demand and challenges of 50 player slots on a server that historically only had around 24 player slots. Our attention will be on these topics and more moving forward as we focus on changes that bring enhancements.