I was watching the TBS feed and none of the commentators said anything about the point of primary contact which was to the jaw. They showed the slo-mo replay from the side and it was shoulder to jaw. Obviously Danault was in a vulnerable position and set himself up for a heavy hit, but it was Hyman's responsibility to avoid the head and he didn't do it.
The SN replay is embedded here:
Zach Hyman levelled Phil Danault with a huge hit, who had to leave the game immediately. Details inside.
www.oilersdaily.com
I'm sure the league isn't going to do anything, but by the books they should.