it's way too early to tell if Brunner is worth big money. He's only played 19 games. We don't even know if he has the gas to play a full 82 game season plus playoffs. (the Swiss play only around 50, less physical games)
It's Kenny's best interested to get him signed now, before he proves that he can score at this pace for 80 games for more than a season or two.
If he continues to prove himself, YIKES, is he in for a big payday.
What happens is Dats gets the benefit of the doubt because he actually plays pucks with his skate like that on purpose. Like in this case, he receives the pass at his feet either before or at the blue line, and the refs who are so accustomed to him using his feet gave him "possession" even though he technically skates ahead of the puck across the line. He maintained possession and no one was checking him for the refs to say he didn't have it. If that had been Tootoo it would've probably been called offsides.
I think it's pretty safe to assume that if the puck is within 8' of Pavel, then he has control of it. Doesn't matter who has the puck.