The reason I dont care for Flow too much is for a few reasons...
The excessive use of reverb on Khan's vocals (I believe a lot of reverb is a tool of the weak singers) and he really does not need it.
Riffs were kinda boring and samey, big let down from such a HUGE talent that is Tore
Too many electronics - made the whole experience seem inorganic and cold
Lyrics seemed a little trite. Parallel Minds and In Your Multitude were awesome and heartfelt.
Also Khan used more of a limited vocal range, not as much of a falsetto yell.
It was more of an experimental record but far from the original formula which made them so great in the first place.
Most people seem to like "Flow" the best because their most commercial attempt, but to me they reached their apex at Parallel Minds. Every song was awesome, diverse, and the perfect mix of prog and power. Parallel had some real attitude to it, while Flow seemed kind of sterile and predictable.
Don't get me wrong it is a good album with some good songs, but just not as great as their first 3
Thats all I have to say about that