I disagree with much of your post, but the first point bothers me the most. If the trilogy were about Luke's disillusionment and fall, I would have been much more interested. You are filling in a ton of back story that I can see making sense, but you can't just handwave it in, especially with a character as important a Luke Skywalker. I can see a creative and emotionally compelling series about how he deals with impostor syndrome and I could even see it ending very badly for him. Treating that character arc as a sidebar misses the point of the entire saga.
>>darker+(OP)
The intent was there, even if it was poorly executed on. That lack of coherence is one of the most frustrating elements of the new trilogy for me. It had a lot of good ideas but no sense of direction.
>>krapp+7K
It wasn't executed on at all. The story was not about Luke, it was about the new class. Which could have been fine as well, but they ruined Luke's character with no explanation. Some people care about that.