Personally, I think Epcot is still worth it. We spend most of our time in World Showcase exploring the pavilions and eating at the various festival booths, so if that is where you plan to be for the majority of your day, you will have a great time. While Future World is a mess, the rides are still open and they are still fun to ride.
I will say, with no park hoppers on our last visit, we stayed the entire time and ended up doing some things in Epcot that we haven't done before -- Awesome Planet and Reflections of China were both awesome shows and I would do them again. We completed the F&W Remy scavenger hunt and had a blast with that. We were able to eat and drink around the world TWICE, which was awesome because we often have a hard time choosing what to eat.
Now that we have PH tickets for our February visit, we plan to hop to Epcot in the late afternoon so long as there is capacity so we can enjoy the some of the festival booths for FotA.