This is fantastic! It's mixed excellently - it's both clean and lush - something not a lot of people pull off. Most people go too dry trying to sound clean, but really they don't have control of the reverb.
I also love the little shifts in pitch here and there, that really does solid.
That little progression around 2:15 is also peak, very subtle, but also gives it that emotional depth while the track is still in the background and not getting in the way.
I know Fox said it could use a little more change - but given the nature of the track, I think that for what you presented, you actually executed it well. If it were to go on much longer, that's when you'd want to shift key or something like that, but I didn't actually find myself wanting for anything like that.
This is really solid work. Well done!