As far as the WWE doing a tribute. You are talking about someone who is family to them. They find out that him, his wife, and his son are dead. Police are "NOT" allowed to give any further details on what happened until a coroner's report is given, so, how really can anyone say they knew at that time.
Don't get me wrong, I feel horrible that someone I admired, who now according to reports, did a very bad thing. We are just observers looking in and not somebody who spent each day with him on the road for years and years. Benoit was considered a very private person who didn't let many people in to his inner circle.
Saying this, if I were Vince McMahon, Edge, Dean Malenko or anybody else in he company, I wouldn't even want to think that they lost my friend/family would do anything in this regard. Therefore I would want to honor them the best way I can. Their thoughts were that they lost a member of their family as well and probably were struck very hard by this. It's easy for us to say they shouldn't have done this right away or that, but for them, they lost an honoured friend. I'm sure the shock of what actually happened is now even harder to take for them now as well.