I can totally support the "not bad, but not good" statement here.
That was pretty much my feeling in this movie as well.
As i already did mention on another scifi/timetravel movie post, i am a bit of a critic when it comes to them and infinite was borderline acceptable for me for both the book and the movie.
I wouldn't say you didn't miss much as it does have a bit of a unique take on the reincarnation theme, but they could've done so much more with it.
Thanks for sharing,
you were curated by the