We have had both types of Epcot views and really preferred the one with the road because that view also has a view of the canel which has the alligator and turtles, my kids really enjoyed this. Our 2nd room was also an Epcot view and had a view of the woods/wetlands, this was a very quiet room, but my kids said they enjoyed looking at the alligator and turtles better.
As far as the balconies go, I don't think any of them are small. Most of them are average size ( I think 4 x 6). There are just some that are bigger if you are on an inside corner or some span accross the whole length of a 1 bedroom or 2 bedroom instead of having 2 or 3 seperate balconies, but a majority of them are the average size. The 2nd floor seems to have the majority of the ones that span accross the length, but the view of illuminations is not as good from the 2nd floor, so you give and take.