I'm gonna go against the grain here and say AWESOME! EPCOT is a GREAT place to be on New years! The dancing, the lights, the booze, and the FIREWORKS! I've been there twice on New Years and had a great time!
Simply put, do not plan on doing any rides. New Years is not a day for rides, it's the day for eating and drinking! The crowds in world showcase get really bad as evening approaches but are completely manageable during the day. DBF and I drank half way around the world, took a nap between france and...germany? I forget which one, but it was by France in the grass, and then we finished drinking then had dinner at the special New Years Eve dinner thing by Canada. After dinner we basically staked out our spot for the fireworks and waited for 4 hours. In hindsight, I probably wouldn't have done that again and would be much more in favor of drinking for that 4 hours, but oh well, live and learn!
Once nightfall comes, you really have to pick your movements carefully. It is most crowded in Canada and Mexico but not as bad as you get toward the UK and France. Find a general area and stick to it for the most part. If you go anywhere near the end of the world showcase, it will literally take you 20 minutes to get through...at least! Also make sure you get a free New Years hat and party favor as soon as they start handing them out. They go quick!
New Years really is like xmas day at MK. You just have to accept there will be crowds, don't plan on rushing at all, and enjoy the day. Being in a hurry or trying to rush from point A to B will get you nowhere fast and ruin the night.
Hopefully that helps. My first time at EPCOT on new years was when I was a CP and I went after work, found a spot for the fireworks, and fell asleep cuz I was tired from work LOL. I don't think they had all the DJs and stuff that year. Hopefully they continue that!