Drums sound a lil outa time, or at least the kick does or summin (its not all the time just every now n again), just sounds a bit wierd, i like the ideas tho nice vibes.
Try allow the switch at the end, bit to drastic imo unless u were just tryin to make an end to the clip?
You could try holding the synth stabz for one of the bar changes for some variation.
Maybe stick some vocal samps in there?
I like the string breakdown thing, so just carry that on for longer to give it more of a break in the tune then come back in to the original drop.
Get another synth in there an at the end of a few bars introduce that instead of the main hits u got goin then make the drums more tappy wen an if u do decide to do it.
Well thats as many ideas i can give u without goin into too much detail?? hope it helps