I like it. Very simple and clean. Also nice sticker on your Macbook! I used to have a Pikachu sticker that would look like it was playing with the Apple logo lol, it fell apart pretty quickly though.
For cable management, I would get a length of corrugated tubing that can be cut to length (you don't have to buy all 50 ft of it). Nail/screw it to the back of your desk after slicing open horizontally. It will hold all your cables out of sight, and you can slice it vertically to run cables down it you want.
I get what you're saying. My problem is that my cords to have everything connected are short to do this. The tubing will help but that tubing will be hanging so I don't know if it's even worth it.
Put the computer on the inside of the legs to give your cables some slack and you can hide them better or get longer cables.
Love your style man, looks really really good. Super clean