To be fair to Bednar here, the linchpin of his entire system is and always has been skating hard. Skating hard allows the defensemen to be more aggressive in the offensive zone because they know the forwards will cover them, it's what makes the forecheck work when they close quickly on the puck carrier, and it's why the rush offense works when the forwards push the D back and give the second wave a chance to fill in. Everything hinges on skating hard and not dogging it on the ice. Players like RyJo who refuse are stuffed in the doghouse until they're jettisoned.
So when the Avs give that kind of halfhearted effort out there, literally everything breaks down. If the team can't give Bednar his most basic requirement, it's hard to blame him when the rest of his tactics don't work.