It's been a long time since I read the novel, but it seems like a good encapsulation of the original (even though I seem to remember it covering a longer period of time).  Was there really any guilt on the painter?  I really don't think so, the guilt is primarily on Dorian himself (although Sir Henry definitely aided it).  Even Oscar Wilde could write about someone who didn't want to take responsibility for their own actions and blame it on other people.  I guess some things don't change.