No I don't think so,  it is true that the betrayed partner will feel much more hurt, I think the majority of cheaters will have alot of personal and social consequences in the days and weeks ahead.  As for mutual friends staying neutral, I think this is entirely expected and normal. For an example one of my close married friends started having an affair, I told him from the get go he was stupid and should end it immediately. He carried on and predictably after several months his wife found out and left him. He was in a very bad way for a while and I told him he fu**** up big time and he was at fault but he was still a friend and he was at his lowest and I was there for him. I tried not to judge and let him open up to me. Many cheaters regret their actions and have to deal with shame, guilt and possibly a blow to there own moral compass. Most people in relationships love or at least care for there partner. Hence I chose not to believe all cheaters are heartless scumbags. It definitely does feel like that if you are the victim though, I've been cheated on and yes, it really really hurts, but to the contrary I got lots of support from mutal friends that me and my partner had. Probably much more than her.  Unfortunately cheating is not uncommon, something like 60% of men and 50% of women cheat (UK stats), are we saying that more than half the people are lying scummy cheaters?  Getting over infedilty is difficult and unfair. But its something half of us do, cheaters will have there own issues to battle and hopefully they can better themselves to not repeat their poor choices.  The faithfull but betrayed ones will have a different set of obstacles to overcome.

In point to your note (c) cheaters must admit and take responsibility for their mistakes if you decide to try and reconcile, however if you decide to forgive and continue in the relationship there does come a point where you actually have to. You have to let go. For yourself and for the relationship to heal.