@Cheese9ManReminds me of a discussion I once had on Halo Waypoint where a guy was saying, "Name a feature of Halo that wasn't stolen directly from CoD. You can't. Guns. CoD had them first. Movement. CoD original. Throwing controllers at TVs when angry. Yup, that's CoD." Obviously he was being funny because in truth there were quite a few Halo originals that CoD lifted. And that's fine. That's as it should be. The only problem with devs borrowing liberally from one and other is that you run the risk of ending up with a very homogenous set of Big Titles. I don't think we're quite yet to the point where all individuality is wrung out of games, but we might get there at some future point. Who can say?
Oh, and the ping system belongs in every team-based game there is. It's a good example of something so right that even 343 wasn't ashamed to lift it.