In my very humble opinion I think the composition is good, the piano sound needs to be more authentic (different library) less bright and overall bigger in scale. Please do not take MY opinion as criticism. This is a tough area to crack and what is the ideal Piano / Sound / Library - I do not know.
Thank you! I also thought that the sound of the piano could be a little problem. I own and I use only Native Instruments The Giant. I know that this library is better for trailer stuff, but right now it is only option for me. Thank you again for you feedback!