No, there is nothing wrong with them. The newer buildings are, well, newer, but the older buildings are still quite nice. It's not even clear that the newer ones are necessarily "better"------if I recall correctly, the older buildings also have the better whirlpool tubs rather than the newer bubbler-only ones. Part of the problem is that here on DIS (and similar places) everyone suddenly decides that unless they have the very best thing possible their vacation will be ruined. But, not everyone can be in building six, and not everyone can have an upper-floor view of Epcot.
For example, I just got back from a stay at VWL. I was on the "bus side" not the "lake side". Did I sometimes hear a little bus noise? Yes. Did it ruin my vacation? No.