I agree with everything you said except the Lucas and writing staff. I believe that Lucas solely wrote all the PT, which is why some of the dialogue can be cringe worthy. Reason why ESB and RoTJ are my favs, is that Lucas only co-wrote them. Not a good writer IMO, but a FANTASTIC story teller.
We're both partially right actually. Lucas soley wrote TPM and ROTS, but Jonathan Hales co-wrote Attack of the Clones with him.