It's strange to see So meone blame a star-wars movie for habing loose ends... This is what they do! Epsode 4 did not explain every little details about what the hell is the empire, why is the rebellion rebelling against it? Yes they blow up whole star systems, but they must have reasons to be so upset at these people... Etc. I mean, the last thing I want is 12 hours movies that tell and explain every little details ofmtheir lore, it makes no sense...
That being said, Han and Lea's son path to the dark side did not feel like a probable thing, his anger lacked flesh and his motivations were unclear. I mean, simply wanting to be as strong as darth vader is petty and vane, why did he revolt so abruptly against his parents, both of them to the point of wanting to kill his father to prove himself? He acts like a pawn at best, that does not strike me as a strong mind (for someone who does mind tricks it's pretty incosistent)... Now the whole movie is held on this character's motivations! That hurts ecerything else as it seems his position is not deserved, in the end he seems small, being beaten by someone who did not even know she had force powers a few hours earlier...
that bring us to the next storyboard flaw, time line wise it seemed like everything happened within a day or two,no time for anything to sink in inany of the characters mind, no time to build the relationships (it does not have to happen on the screen, but let us know somehow that a week, or a day passed between major events, so we can guess that the people know each other more, or they grew somehow...
all in all it seems like a mashup of star-wars tropes, despite its many flaws i kind of liked it anyway, certainly better than ep i, ii and iii...
