Thank you for playing.
That's a lot of feedback and I appreciate it. Trinkets are a recent addition that I haven't integrated all that well yet, although the trinket slot has an animation to let you know when you have unlocked some. I think some of the things you have brought up make more sense in-universe after reaching certain points in the story. As an example, skills that affect positioning become more prevalent later on and you also may get to play as other characters. Who knows.
I'll look into the issue with the store too. Thanks again.