I like.
I especially like the shrouding of the PCI-e cables which are usually very distracting from any cable management attempts.
The only ideas that pop to mind at the moment are if you feel like it, you could remove the motherboard screws on the right side and wedge the front-top panel cables and hopefully CPU power cable past the standoffs to sit behind the motherboard. And maybe put the bottom 3.5" HDD one slot up, then tuck squiggles of cables under it.