Sounds awesome and there is nothing wrong with static rain in a song like this, just make it a bit lower in volume.
First of all, I love the piano piece. I think it is very moody by itself. I don't think you need the endless rain. At first, the rain and thunder sounds cool, but it gets old rather quickly. Maybe turn it down a little, to be more subtle. I think the original piece is a little empty, maybe, and this version is a little to crowded. Something in between will be perfect!
Thanks for the notes, I definitely agree with you. The main reason for the rain was that I too knew the main piece was too empty, the ambiance filled in some of the blanks for me, for now. I agree it's a bit crowded, and a bit repetitive at that. One day it'll be a complete piece, with more variation in melody, and less reliant on rain ambiance, so goes the plan. Thanks for the kind words and honest review, much appreciated.
Please contact me if you would like to use this in a project. We can discuss the details.