Hasn't anyone yet noticed that "3% of the rooms" would be between 6 and 9 rooms?! (If you count 280+ rooms, with all lockoffs split, you get 8.5.) Even if you were to only include 5th floor rooms, this is patently false. The CM at Member Services either didn't know what s/he was talking about, or has an extremely narrow definition of Epcot view.
We had a wonderful direct view of SSE from a 5th floor room on the spur, and roughly this many rooms on the spur had identical 5th floor views. But our view was so good that the 4th floor must have a reasonable view as well. About twice times as many rooms on the main spine have an Epcot view as well (green rooms on Doc's map that are at the end of the main spine), and others have a view of World Showcase with a great view of Illuminations fireworks (the green rooms that are nearly perpendicular to the spur).
We did not find vehicular noise to be a problem, but it is a legitimate issue.