Love this.

I`d say the main bass riff is so lush and present and "real", that it makes the backing a little static and tonally dull.

I`d give a little more top end to the kick so it matches the presence of that main synth.
Also the hats sound just a little thin again, and lack the sparkle and presence needed.
A touch of verb and retuning the high freqs is needed.

Essentially you used 2 very nice, but very saturated and analog (sounding) synths as your main draw, and this in turn has exposed the sample based nature of a lot of the other sounds.
You need to add a similar sparkle, presence, and wetness to the other sounds in the mix to really bring it all up to scratch.

I`d say asthetically (and this is the subjective bit, so ignor me if you will), shorten the amount of time you take to bring in the bass riff.
Get the other synth in a little earlier, and then play with them.
Add some subtle positioning and note changes throughout to keep the interest. I think you don`t need to overly complicate this by adding more parts, as really, what you have here can be fleshed out, and the simplicity and the strong mood, will carry it thorugh nicely.