DarthJedi said:

-Leia's lack of emotions concerning the destruction of her home planet with her family, friends, pets, etc.

I would agree with that one. For the record, it's handled much better in the NPR version of the story. Leia is considerably upset and distraught over the loss.

-Luke knows that Leia has Force power, because she is his sister........ but somehow Vader wasn't able to sense in when she was standing right next to him earlier on Death Star and in Cloud City.

This one gets a pass but only because the family connection hadn't been invented yet. Until Lucas had to ham-fist his way out of writer's block between Empire and Return, Leia was an unrelated princess.

All that sister bullshit came way late in the process. He'd literally painted himself into a corner by filming the "There is another" scene in Empire - long before he had any idea who it would end up being. Lame.