I'm going to be mental here and even suggest I might play O'Nien RB and Hume LB.
O'Nien is by no means a RWB, but he'd do a job there. And with his energy he'd be great at overlapping Pritchard and allowing him to move inside more.
I feel that there are two reasons our style of play has been made more slow this season than last. One of those is O'Nien playing CB and this desire to play out from the back. It slows us down massively. Last season we got the ball up the field quickly as our defenders werent as comfortable on the ball. So whilst O'Nien is so much better at playing that way than Batth is, its actually changed the way we play for the negative, IMO.
Seelt and Ballard at CB, with an instruction to hit longer occasionally, would suit us perfectly.