Some Plotlöcher towards the end

In the first half of the book Beth Revis has as always managed to amaze me with their ideas and turns. Then no longer. I could foresee some of Twists long. That was, however, not what has curtailed the end for me, but the fact that the plot was always full of holes. The ideas themselves were good and a worthy conclusion to the trilogy. But something was illogical or not thought through enough, and that's a shame, because that would certainly be able to get even in the handle. In addition, my World Building did not like because it was nothing special, but relies on things that are actually already totally Swallowed in the Science ficition.
I would like to say that I found it a pity that Beth Revis has to approach its end is not solid, but is still bent on the last page to the conventions without spoilers.
Still, I could not put, it was as always very exciting and to read it is worthwhile in any case, the book.