This has been happening to me since launch. I followed the instructions on what to do and even reinstalled the game without the HD packs and it just froze twice, once back to the homepage and once completely shut down the xbox. Mostly on conquest but its happening on all game modes. I was skeptical about buying an EA product since the SW Battlefront game, and yep, should have saved my money. EA hopefully now will get rid of the horrible testing now that they are privately owned, maybe they will care more about releasing a stable product, especially for consoles.
UPDATE... After a decent week (having 3 days off during the day) it seemed like only certain maps were a problem. Well that's not true. Last night booted twice in a 3 hour session( not bad). Today? Booted over 10 times since 6am. Most games have had lots of bots. Fiddled with my NAT settings, doesn't matter. Guess we are all alpha testers for their servers at this point, I can't imagine what the other issues could possibly be.
