Sorry, another CEA/Reach maps question, just don't getting it

I’ve read the latest bulletin but here’s what I’m afraid of, please awares me.

I’m afraid if I trade in my copy of Reach for CEA I’ll be limiting my number of online maps I can access through CEA. I have the DLC for Reach, but do I have to do anything else if I want to trade in Reach and still get the full online experience?

It sounds like they want you to have both, download the CEA maps to your hard drive, then whenever you want to play online, do so using the Reach disc.

Will I be missing out if I only have CEA?

I think the DLC maps can only be accessed via Reach.

i wouldnt trade in reach, i’d still like to have my challenges done :3

If you trade in Reach, you cant play the reach maps, or the DLC for reach (Noble and Defiant). From the CEA disc, you can only play the CEA maps.

Answer your question?