Here's a couple of suggestions for all cases:
- half an inch of space behind the motherboard tray so there will be a lot of room to tuck/hide cables.
- CPU cutout hole should be bigger, instead of a square let it be a giant rectangle across the motherboard tray.
- no more inherit grills for fan locations. I like what you did for the 690 II and HAF X as there are no grills for the front intake and top fan placements, it's all open. I'm hoping for the same thing for the rear fan placement, just add a modular grill.
I hope to these implemented on revisions and future cases.