The part between Cersei and Robert was really very good. Also Littlefingers and Varys ''duel'' was nice. I really enjoy scenes that are not in the books, but show that much story and life behind them. It's true that the implied things (of the book) are really rather obvious in the series. Personally Renly is too much of a wuss. I have no problem with the explicity of the scene, actually I quite expected such a scene after all the nudity, and sex from all the other characters. But he is portrayed as such a whiny wimp, that I really have problems to see him as a true contester for the throne (as it even seems it isn't his idea, but Loras').
