There's just one little problem there.  Because the hardcover version of the TFA novel was not released until 5 months after the theatrical release of the movie. 

The digital download version of the book (released the same day as the movie, BTW), which can be far more easily edited given the means of distribution, may have seen more robust editing at the hands of Lucas Licensing and the Star Wars Story Group.  The same might be said of the audiobook, too.

Audio version released same day as the movie.  My hardcover version shipped January 4, 2016 and arrived on January 5, 2016.  Paperback was end of September.

I am quite aware of the holocron and the Karen Travis saga.  IMO, part of Lucas showing he really couldn't tell a story anymore was his desire to have a warrior race taken over by pacifists.

That aside, the book isn't written based on the final cut of the film.  It just can't be considering it is released the same day as the movie.  That includes the audio version of the book.  Let us assume that Rey and Kylo are brother and sister in the original draft of the script.  It doesn't get revealed in the to the viewer directly, but is hinted at with the "it is you" line.  This first draft script is given to Alan Dean Foster which he uses to write the novel.  The novel gets approved by Lucasfilm/Disney.  After that time, new script drafts are written, changes are made, etc.  By this time it could be easily too late to change the final edit of the novel.  There are things like the Snowspeeder chase and Chewie ripping off Plut's arm in the novel that we have now seen as deleted scenes.  That does not mean they are canon.  The "it is you" line is only canon if Leland Chee or Pablo Hidalgo or someone else from the storybook group confirms that it is.  As of now, it contradicts what is seen in the theatrical release, which would seem it is not canon based on the previous statement from the story group.

Both the TFA novel and the Rogue One novel are closer to the final product than the OT and PT novels, but they are still differences which most likely comes from script edits and final cuts of the film.

The novel dialogue may not be canonical.  I have not heard a specific statement on this line, but pre TFA it was stated that movie novelizations are canonical unless they contradict what was on screen.  So things like Blue squadron in ANH and the appearance of Yoda in ESB are not canonical from the novel descriptions.  I think ROTJ novel may have had Owen being Obi-wan's brother as well.

I would say the defensive play was just one play.  It is hard to give an MVP for play.  While Edelman's catch was pretty amazing, it wasn't a drive saving play.  A drop may have killed the drive, but it wasn't like it was fourth down play.  If you don't give it to Brady, then I think it would have to go to White.  He had 3 TD's, including the game winner, plus one of the two point conversions.  I would say the most impressive thing about the comback is that it almost all happened in the fourth quarter.  The Falcons were still up by 25 until about 2 minutes left in the third quarter.

The events of Bloodlines does not make it seem like the "profound tragedy" has happened yet.  While Han and Leia are not "together" as being in the same place in Bloodlines, it does not appear that they are apart as we see them in TFA.  I have to think the "profound tragedy" is Ben's transformation into Kylo Ren and his destruction of the Jedi Temple. 

The timing of everything is what seems off.  Initially, one would have thought Rey was abandoned on Jakku in response to the massacre.  However, the massacre occurs a lot closer to TFA than ROTJ.  The huge mystery would be the who and why of leaving Rey on Jakku.  I also have to wonder if Rey is her birth name or not. 

If Rey is Han and Leia's daughter, do they not know it when Han finds her or Leia sees her once back they are at the Resistance base?  If they do know it, it seems pretty cold not to tell her.

If Rey is Luke's daughter, were Han and Leia unaware that he had a child?

If she is another Chosen One, then we just have some poor writing.  If the Sith, as we know them, existed in the shadows for around 1,000 years, and in all that time we only see the Chosen One when Palpatine becomes the Master, why are we seeing another one about 50 years or less later?  I guess we have to wait and see what Snoke is.  He does not seem as powerful as Sidious as of yet so it would seem odd that another Chosen One would be needed to take him out.

I think Luke makes the most sense from a story standpoint and the possibility of an episode X - XII trilogy.  While Disney has not announced that they plan any more numbered episodes, I would think it has to be a possibility.  If the numbered episodes are the story of the Skywalker family, then we would need a Skywalker to continue.  If Rey is a Solo, while a Skywalker descendant, she won't have the name.  If she is Rey Skywalker, or "Original Name" Skywalker, then she can carry the name forward.  If they continue the possible Rey/Finn romance, since he doesn't have a name, he can take the Skywalker name if they were to get married.

Rey was dropped off prior to Ben's betrayal.  Ben's betrayal has not had a date set yet.  Rey is 10 years younger.  Ben was born 5 ABY and Rey was born 15 ABY.  With TFA at around 33 ABY and the events of the novel Bloodlines six years prior to TFA, it doesn't seem like the theory (that Ben took Rey to Jakku) could hold up.  The Falcon is gone by Bloodlines, and Han is out and about running a racer team, but Han and Leia are very much in contact.  Han isn't at the point of going back to smuggling yet and Rey would have been on Jakku for around seven years by this time.