The purple prose is mostly in descriptions and it isn't that bad. He said Dialogues are fine. I'm having fun so far.
Don't tell me there is nothing in the UI that works with the Tides except that little icon in the corner?
Yes, you can only see your dominant tides in that little icon.
But do they have a meaningful impact in the game?
Not that I experienced.
If they have an effect, then that effect isn't signaled, so I might have missed it, but in my experience dispositions in Pillars were much more meaningful, and they were mostly fluff. In Torment they seem to be purely fluff.
Maybe they can change some things in the ending slides, but my ending in particular didn't.