Ron - Thanks for doing this!
A perfect demo. I think. I tells me what I need to know (I appreciate your Producer Hat)
From this, I would label that piano sound "lo-fi". It is rather one-dimensional.
That can be a very good thing in a mix - as you have demonstrated.
This sounds great in the mix - because of its one-dimensional-ness. (I make up good words)
The right reverb might open more possibilities.
But lo-fi-works-in-the-mix is a good thing.
fj