Without hearing the track, any advice is just a guess.

the ear has to be the final judge..... but the ear of a piano player (especially the one who played the part) is going to have a different bias than the ear of a drummer or an engineer.

This is where you have to trust your own ears to be non-biased and wear the many hats required in mixing your own stuff......or post it where people whose ears and advice you trust can hear it to advise you on the mix.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.