Windjammer, don't you mean fail? I see way more Nays than Ayes.
As for the reasonable doubt wording... why? I mean, I understand it is very hard to prove cases of rape or assault, but it's hard to prove anything. The standard exists because, as a country, we believe that people are innocent until proven guilty. Not "suspected mostly guilty." I don't know what the balance is, but "50%+1 evidence" isn't fair either.
I would point out that you are talking about applying criminal standards to deal with criminal accusations. If anything is unfair, it's treating very serious crimes as if they were internal university matters in the same fashion as cheating on an exam.