I don't know what train wrecks you are speaking of, but to defend a little... I know on day 2 they were having serious sound problems on all the stages due to the extreme heat. During both Donald Glaude and Kevin Saunderson the sound on the main stage completely cut out because stuff was over-heating. You just can't plan for 90-100 degree heat in May in Detroit.
I too didn't like the fact that I didn't see a whole lot of vinyl, but it mainly just showed me that the industry is changing. You have to think about the fact that these "headliners" travel the world playing music; and purely from a convenience point of view....what is easier to travel with......2 vinyl flight cases weighing 80 lbs each or a single hard covered CD book weighing about 50 lbs that you can carry on the flight. I fully understand why they do it.....even though I am still a vinyl purist myself.
I have been to the last 3 DEMFs and I think last years was the best one I've been to by far. There was just more high quality music available.
The Louis Vega (with Mr. V doing live vocal) set was amazing, Julius TMT was an amazing live performance, and Derrick Carter's was tight too. Not to mention a shit-load of great house sets from local Detroit DJs.