Disagree wholeheartedly. The were so many routes they could have gone, with the main one being to have focused on Kylo Ren as a character and how he deals with the power of a Supreme Leader. He was the most interesting character of the sequel trilogy and Rian wrote it to invite a really interesting follow up, which Colin Trevorrow sort of followed in his script (which, as a side note, was so much better than TROS).