Having peronally been through this level of trauma I can say that the Cece ending eased my mind (the others are more open). I understand people wanting to think of others but we are here and making our own descisions. The warnings are given and the subject matter is clear from early on so anyone who really cannot face it would likely not complete any play-through.I understand your point, but for many the full impact of the Cece Route on the first play through is so... strong that it literally keeps them from playing any of the other routes. Trust me, Cece's impact in the game is powerful regardless of the route you are on. For those who have ever experianced anything similar in their own lives, the full on Cece route first play through could cause/reinforce PTSD issues.
Again, for the full experience, Cece first would be my recommedation.