This article hits all the main issues I had. The primary ones being the weakness of Kylo as the main villain, which totally removes any tension from the last half of the film, and the Mary-Sue-ness of Rey. I was left wondering where she's supposed to go from here, now that she's already a skilled Jedi, without ever meeting an actual jedi (prior to the last 60 seconds of the film), much less having any training. Lots of smaller issues as well, but those were the main two.
I would like to give them the benefit of the doubt that they've got some sweet plot coming up that justifies rushing her jedi progression - maybe more about moral quandaries and light/dark struggle, less about training. But even that I wonder, since this movie was more or less a rehash of episode 3's plot, which may appeal to some folks, but personally I'd prefer to see a new story. They shoehorned in a lot, and the whole thing felt very rushed to me, but that's probably what kids today want.
I did appreciate the use of more 'real' aliens (as opposed to CGI), which helps link with the style of the originals I think. Overall they definitely felt more like true relations to the originals than 1-3 did, and that was good.
TLDR: They did a good job with the props and filming. The story and characters were sorely disappointing to me.