Just note about DS4. I really dislike placement of the USB connector, which is meant mainly for charging. It's placed on separate board and than signal and supply volatge goes through two connectors and flat cable. Even if they use more wires for supply voltage and ground on the flat cable, it is not good solution. And folding of the flat cable ... not nice.
It will probably greatly disturb you that flat cables were extensively used in PS3s (at least my phat one) and they weren't exactly a source of malfunction. Heck my VAIO laptop from I think ~10 years ago had foldable flat cables and they didn't cause any trouble.
Really? A complaint due to the controller using a relatively light and fold-able flat cable?