Cutting the obvious out of this: Yes, I agree with everyone else, try a different intro approach.
I agree here, instead of a short sharp snare, I think a more drawn out snare would fit this mix more. It feels to me you went for a more "dreamy" or "spacey" ReMix.
Because of this I believe it really is lacking something great. I think the lead from 3:35 could be implemented into something with the chord progression, maybe some sort of angelic-like plucking.
I personally like chill tracks like this, but I do agree with you that something is missing.
Agreed, I think that this would be a fantastic area to experiment with some arping and what not.
Overall if the drums were EQ'd a little bit more, maybe EQ the kick a little more sub heavy, unsure though.
(Sorry for riding your review to give mine, I've decided to become more active in the community and I want to get the general idea of what a "good review" is besides constructive criticism.)