the CRJ 200 needs approx 5000ft of runway. they had 3500 which tells me they were not in a high speed abort, right?
With all due respect, you're not a crash investigator and have zero information for the causal aspects of the accident beyond runway length and hugely approximate performance data.
Otherwise, all plane crashes would be "Well, the airplane hit the ground too hard".
Sure, but why?
Did he choose the wrong runway?
Did his performance data mistakenly indicate that he had appropriate performance for that runway?
Did he execute a high speed abort, figure that he didn't have the performance to stop in time and firewalled the engine?
Was the signage proper or confusing?
Did the pilot *think* he was on the proper runway?
Without answers for the above questions, you really can't assume anything whatsoever. I don't want to pull rank, but I studied aircraft crash investigation for a few semesters in college and Bill Waldock and Craig Funk always insisted that the 'most obvious' isn't always the whole story at all.