The only two plot pieces that bother me about VII are:
Rey being amazing at everything she does for the first time (Falcon, lightsaber, force usage, etc), and
Kylo magically appearing wherever he wants at the end (from killing Han to facing off against Rey/Finn).
I was fine with VII having the same basic timeline/plot as IV as well, but at this point I think the Empire/Kights of Ren/bad guys need to think a little outside the Death Star.
To defend Abrams a little here...we do not know Rey's background, so her life as a scavenger and other experiences as yet unseen must have prepped her for what she can now do. She was intent on waiting for someone on Jaku, presumably family or guardian, and they may have "tought her well". Think back to Luke, and how he takes to blasters and the Falcon's gun battery and X-Wings and all that having grown up a simple farm boy.
As to Force usage, the obvious intent is that she is the awakening of the title, and her powers are mostly unknown to her (but may have been operating in the background, guiding her flying, for example). Rey's ability to best Ren in a light saber duel was as much due to him carrying a gut wound from Chewie's uber-powerful bow-caster (they labour that point a few times). Contrast that fight to Finn's effort, in which Ren dispatches him at will after Finn clips him and Ren stops playing and gets serious. After that, Rey is losing the fight horribly until she draws on her rookie Force powers, and we'd already seen during her interrogation that she is more powerful than he is.
As for Kylo being where he needs to be at the end, he needed to find Han (and could likely sense him) as killing his Dad was his plan for purging what good was left in him. After that, he was already where Rey was, had seen her, and he was then after her to bring her over to his way of thinking.
There's lots wrong with all of the movies (the timeline in Empire - the best of them - is supremely fucked up), but I don't think your two are among the more egregious plot holes. Like...has anyone figured out how Max had Anakin's light saber when it was last seen disappearing down one of Star Wars' patented bottomless air shafts with Luke's right hand attached to it? He certainly didn't retrieve it at the time!