Personally, I'd love to expand out to other games. I absolutely love messing around in games like Garry's Mod (TTT, specifically), ARMA 3, ARMA 2 OA, etc., but it really doesn't fit the realm of MCGamer. At least, not for our current plans, plus us having too many projects as-is needing completion (you all should be aware how true this is...). Our focus is currently on improving and fixing our current game types, and upgrading them to support the newly made leaderboards.
Undoubtedly, I'll bring up additional games outside of Minecraft to Chad/the dev team again in the future. I've been suggesting it for the past couple of months, but if you think about it, we're obviously dedicated to Minecraft. Heck, even our website caters directly to Minecraft. Advertising wise, we would have no placement for these games, and it could easily flop. That's the price you pay for gearing directly towards Minecraft, I suppose.
I'm rambling. I'm tired. My two cents are there, and pretty much the decision is "not right now." If you're in support of this, feel free to voice yourself here. I can't say MCGamer will ever have other games, but personally, I would love to expand out if we could.