If you were someone disappointed with Halo 4's infection mode, you'll be happy to know Halo 5 lets you go back to basics. While you can play the new mode (which looks good) developers tell Game Informer that players will have a fully customizable experience for custom games to play whichever way they want most.
Personally, I'm a fan of the changes and think 343 did a great job enhancing the experience. At the same time, I appreciate the fact I can customize and go old school if I want to. 343 has really been killing it with Halo 5! See the changes, revitalized maps, and customization below.