Yeah that is one thing I wish I had got on my rig too especially with my case. But you did a decent job tho cleaning it up but you can still get it better. Do you have any electrical skills at all noob? You can remove the SATA power connector from the wires and put a molex connector in its place if you get the pins that go into it...
But Im sure you really don't want to go that far into it tho.
I mean all that the cable management is going to do is look better and maybe cool down your whole rig a degree or 2 because of better airflow. Its not going to be a huge difference tho. But I just like to have mine look as sexy as possible cuz you spend so much money on it why not pimp it out right..