Well, for your first remix, it's not bad. The two main issues right now are your mix and your transitions. Without getting into specifics, your mix could use a little fixing, but I'll let it go since this is still a WIP, and you may or may not have done any mixing up to this point.
Your transitions could be smoother. The dubstep parts and the chillout parts are very different, and you're trying to glue them together with sweeps, or nothing. They almost feel like separate entities.
Also, I am not entirely sure about your ending. You will change that, right?
-Annie