I think the overall "fail" rate of new buildings have gone up even as better tools have become available. Now we can debate what's a failing design, but when a building needs significant work within 20 years of being built I think is a strong indicator, and at every level this has been going up.

I think the idea of deconstruction has promoted the idea that the architect is supposed to pick what a building looks like and as soon as people approve his design his job is basically over except for the building phase.