We’ve already seen a bit of Rey’s flaws and failures. Her reluctance to admit she’s been waiting in vain for family that’s never coming back, makes her pass on Han’s offer to join him and Chewie. Running away from her destiny is what gets her captured, and almost costs Finn his life. I imagine she may carry some residual guilt over Han’s death going forward as well.
I was referring more to her physical competency more than her emotional weaknesses. I have no complaints about her emotional issues, and to your list I would add that she may have anger/darkside temptations going forward, which is perfectly understandable. It’s just that she is a mechanical wizard, a fighter who can hold her own against several opponents, an ace pilot and a crack shot. She herself seems surprised at how adept she is at these last two things, which gives me hope that her abilities will be explained in the sequel, but as it is now her abilities strain my credulity. I don’t want to give the impression that I am against ANY female character having such competence, for example I fully buy the character of Imperator Furiosa. I just don’t buy Rey’s abilities thus far.