Basically what we're seeing with Ottawa is how most of the league will eventually go with 3on3.
It really is terrible hockey, because it's like a a heavyweight boxing match where one huge punch can end it quickly... but to do so you expose yourself to the opponent. Therefore both play it safe and conservative and never really go for that real KO unless the other side makes a misstep.
So all you do is watch risk mitigation for 5 minutes, and if something happens it's because of someone playing bad hockey.
4on4 at least provided that buffer of safety that you could attack and have one person marginally hanging back... 3 attackers is enough that they can make something work against 4 defenders because of the puck carrier having options. 2 attackers though, it's only pass or shoot -- so just one defender is enough to really handle it and 3 defenders means the attacker gets smothered.