What to do with the minecraft server?!

As you may be aware, I run the Legion Gaming Community "Un/Official" Minecraft server. Due to  the issues we have had with griefing and other problems, we paused development of the world. I've been throwing around a few ideas such as creating a whitelist for the minecraft server where members must be in a discord server in order to join, or switching up the server altogether. I'm leaning more towards changing the server to be an adventure/game oriented server such as pixelmon. What would you be most interested to see? For those of you who stream, what do you think would be best for your audience?