Hi,
Thank you for your ideas, currently, we cannot really ready add game modes like the ones you stated due to the way the server is set up. The larger networks you may have played them on would usually have personally developed plugins to fit their server needs and for us, this is not feasible as we don't have to expertise to make such a plugin and the player base to make it exciting as our player base is for the most part too small to include larger multiplayer game modes, they wouldn't be used all that often.
As for events, many in the community-run event and if you want to participate I would keep checking in on the forums or even think of making your own! As an event takes time, its ways depend on who has enough time to run such events and wants too!