The "atheism plus" on the other hand feels to me like "atheism plus political correctness" -- it is certainly not focused on not offending religious people.

I don't have that much knowledge of the Atheism Plus movement, but I have read some stuff that suggests they are concerned about how prominent atheists talk about Islam, at least. I also wouldn't be at all surprised if they had expressed opposition to Dawkins' description of religious upbringing as child abuse. I do know some feminists who were/are pissed about that.