As Ambrosia is moving forward, we should move on as well, trying to help the community grow in different directions. This is a discussion of what we can do as a whole. I will be posting my opinion, and everyone is free to argue and post their suggestions as well.
Now, keeping in mind we're past CS 1.6, we could have 2-3 servers, DD2 and 1-2 other fun mods we could visit from time to time, as the owners claim there is space to run a server or two, our legacy, to remember where we started from. That could mean any mod, but I would go for something Ambrosia hasn't worked on much before, like Superhero, Zombie Plague, Zombie Escape, CoD mod, Warcraft, etc.. something different than most servers, something that has lots of things in it. Superhero can support more than 20 heroes, more than 100 levels, so that's something challenging. Zombie Plague/Escape numerous maps, skins, items. Same for CoD and so on. I don't think bringing back mods like Basebuilder, Deathrun, Surf, Soccerjam etc would have any success.
However, that is just to be put aside, as it's not our main focus. My opinion is we move on to games with potential, popularity and a long-term plan.
Rust: Early Access game, open-world survival, lots of popularity, lots of potential, lots of future ahead of it, not very hard to install and run.
CS:GO: Expanding, get some more ideas, suggestions, etc. Due to the competitive mode, it is hard to attract many players in public servers. So come up with ideas to make something special. Mods, events.. It's the second most popular game atm.
Left 4 Dead 2: Still quite popular, a small server wouldn't hurt, my best guess is it would only bring a few new guys.
Arma 3: We had it before, it's still in top20 of Steam, we can go for it again, with more love this time. We do need volunteers though, people who know their shit.
ARK: Survival Evolved: Just like Rust, lots of popularity, lots of potential.
5 ideas just from the back of my head. Nothing can work out without help and volunteering though. If you do have any experience or could contribute in any way feel free to contact High Staff. If you have any opinions/ideas/suggestions, feel free to post below.