Hey I think this is a really great song!  To me I feel like it should be just a little bit faster.  It seems to be just dragging slightly.  Also I'm curious, did you play this to a click?  I was getting like 140 bpm at the beginning, and then around 135 in the middle, and 137 at the end.  If you didn't play to a click, it might be worth it to give it a try and maybe speed up a few bpm.  Like 143?  Something like that.
I'm getting critical here, but you might also try setting the electric guitar part a little further back with either reverb or volume, that way the piano can sit a little bit more front and center.  And I would totally work on getting the whole snare brushes/acoustic guitar thing matched up better, because it kind of reminds me of a train.  And that's awesome given that the song is about moving on.  Definitely gives it a moving feel.  
I like the vocals a lot!  Just a couple spots where you kinda lack energy, but I think that would be fixed if you sped everything up a bit.  I usually throw some light autotune on just about all vocals to tighten things up, and I absolutely love lots of compression on vocals.  My signal chain usually goes, light EQ, de-esser, compressor, autotune, reverb.  I would actually love to mix this song.  PM me if that's something you'd be interested in.  
Anyways, great song!