The hat that's present through the intro is way louder than the drum beat that drops which becomes obvious once you bring that particular hat in. It needs to be fixed. The snare is off. It sounds distorted and heavy yet is not loud enough. I'd go for layering a more natural sounding snare sample on top. I very much like the drum loop, the samples, the harmonies, and well...everything...it's very nice, just needs some work on the mix down.
Probably holding off the drop too long. You should consider dropping after about 1 minute and work out how you're going to change the samples and harmonies up every 16 or 32 bars.