arrangement Help Me Make This Better?

My Arrangement of Ezio's Family from Assassins Creed.

I don't much like the original anyway, but this probably needs some more rhythmic influence, since it's integral to the original.
This arrangement just sounds like it's constantly on the subdominant when the original also moves around. 

I agree that having something to help drive the momentum (i.e. strumming guitar, arpeggiating harp, etc.) would be nice! You could also experiment with playing the melody on different instruments, and re-orchestrating the chords, things like that. Or depending on how true you want to be to the original, you could use the theme more as a jumping off point and really develop it into new ideas.

Keep working!

Gustav