Ok, so just in case something goes wrong. If after adding my key to Origin it somehow becomes unavailable when trying to install the game using the disc and not Origin, will an EA Help advisor be able to help me? Because as I said in my first post an Advisor already told me that I need not worry. Can I claim that the Advisor told me I would still be able to play via the disc?
If the answer is yes, then I will mark your reply as the solution when I add the key to Origin.