Well I think part of the problem is that, since Christopher West has become so popular, people start to quote him as if they were quoting the catechism, and they (regular people who listen to him) do not always come away with all the subtleties of the theology which he probably intends and perhaps takes for granted that his audience will understand.
For example, i had an exchange online with some young pro-Life Catholics who i am sure were very earnest and orthodox Catholics, but who would not accept me telling them that the purpose of sex was not pleasure. This seems like a fine point, and can make the person (in this case me) who is arguing it look like some kind of prude, but i think the implications of believing that the purpose of sex is pleasure can be quite dangerous.
This is just one anecdotal example. I offer it not to make a definitive judgment one way or the other about Christopher West, but just to offer insight into what the possible problems IN PERCEPTION might be. Some people in the audience might be getting the wrong idea from his lectures, and some of his critics may also be hearing things he is not really intending to say.
One thing that should be of comfort to us all is that West is a theologian, not part of the teaching magisterium of the church. if one does not like the way West presents the theology of the body, one is free to differ, criticize or ignore him. He is speaking publicly so respectful criticism is fair game. if you are having an argument about some point and one of the parties to the argument says “well Christopher West said …”, remind them that Christopher West is not really a source of authority. It is better to quote the actual original TOB lectures given by John Paul II or (i think perhaps even better because it may be clearer and less open to interpretation) something like The Truth and Meaning of Sexuality which might help in the interpretation of TOB.
vatican.va/roman_curia/pontifical_councils/family/documents/rc_pc_family_doc_08121995_human-sexuality_en.html
I personally find Christopher West to be a bit annoying because he seems to think that no Catholic ever knew that sex was fun before - until the Pope clued us all in back in 1982 and now West is going to translate that and clue us regular folks in that we need to loosen up through his patented English comic-book translation of TOB, and if we don’t get it we’re prudes. I think this is silly because to my way of thinking helping people understand that sex is fun has never been the problem. That’s just my uncensored and exaggerated personal opinion and by itself isn’t worth squat - but i think there are other people out there who feel similarly.
I don’t normally go out of my way to diss Christopher West though because i figure he’s just sharing his point of view and he is a trained theologian and some people get a lot of good out of his talks. I’m simply not one of them and if you’re not one of them either that is nothing to feel bad about at all. Some people like Dominican spirituality, some like marian devotions more than others, some fast on Fridays some just abstain and some do extra works of charity. I think there is wiggle room in the real world implementation of TOB as well.