First off, I wanted to state that I have voted against having an XP Cap. With that being said, I want to inform people about the Double XP and the XP cap. It seems a lot of people are saying that they don’t want to play further because they don’t want to waste the Double XP. I’m not sure if people know this, but you can specify the amount of matches you can use for Double XP. For example, if you fear you are reaching the XP cap, just put in on the Dewxp website that you only want to use 10 Double XP matches. If you don’t hit the cap, continue on with however many matches you want to use. You do not have to enter in all 200 matches that you earned at once.
Please note, this only has to do with the Double XP (obviously), and I understand the frustration of still not being able to gain XP through challenges in Campaign and Spartan Ops if you have hit the cap.