While I liked the movie as a whole. I was conflicted over many characters.
First off, Flynn. How you you have a character that is taken as a baby and put through training to be a stormship trooper all of a sudden decide to change his mind? This is one of the biggest issues I have with this movie.
Another one comes with one of the favorite characters that everyone has. How can she already use mind manipulation and summon a light saber when no other jedi has been able to before? Did not like this at all. Seems like Disney just wanted to try to make an op character at the start. I was sad enough that they went away from the books, but now this?
Last, we come to the main villain of the arc. I don't know what to do with him. Do I put him in diapers and burp him? There is no real background on him and you cannot assume what happens to him in the books since they went away from the books. Is he going to be the book version of Luke where he has a period of time where he goes Sith and them becomes a Jedi again?
Last overall issue goes with the plot. It is a complete lack of originality and more a copy and paste of the other movies. I hope this is rectified in the next movie, but we will have to wait till 2017 until then. Hopefully the other Star Wars movies will have more originality and characters that make more sense.
Other than those issues. the rest of the movie was great. I liked how it did not go heavy with CG. The flow of the movie worked very well. It was directed well and the acting was great.