You've got me intrigued. Care to list a few of your favourite "heavy, chewy, thought-provoking sci-fi books"?
It was after failing to get engaged by the three-body problem (again), frustrated, and recognizing that I was dealing with unusually high professional and personal stress which likely robbed me of focus for reading "good" fiction, that I went looking for lighter fare and found this series. The author apparently was a ghost writer for the original star wars series. It doesn't surprise me a bit.
$0.02 :)
I only read a little bit of Three-body Problem a few years ago. Perhaps more character based stories are more your thing.