BT Sport and HD both work for me on the supplied BT Powerline adapters. All the On Demand content works fine as well. I've had a couple of dropped connections on iPlayer but that happened when my box was hardwired as well.
I'm on Infinity with a YouView box.
I was contemplating paying to have my phone socket moved so I could hardwire the box into the homehub but it all works fine so I've saved the extra cost.