Maybe that is why George always had co-writers and people to help him with his weakness for dialog.
He himself would admit to being an overall good filmmaker except for in the area of writing.
He described the process as painful, said he was not a gifted writer like Francis.
He was lucky to have friends like Willard Huyck and Gloria Katz, and to have almost by luck found Lawrence Kasdan to take over scripting of Raiders and Empire.
The process for him is incredibly slow he began writing Star Wars in 1973, and did not finish the script til 1975 or so. Phantom Menace took from nov 1994 to about 1996-97 to be filmable.
The sequel process would have taken him about as long about 2 to 2 and a half years to get the Episode 7 script done, Disney didn’t want to wait and they did not want his story anyway. 2 to 3 years pre production on a new trilogy plus 9 years to get it all done. Disney did their series in half the time.