You're right that it doesn't really matter. With the instigator, Bastian would have gotten an additional 10 minute misconduct, but he ended up leaving the game anyway.
It's just annoying that every time Trouba lands a hit like that, he ends up having to fight and is lost for 5 minutes. I'm not going to argue with you about how clean those hits are, but even you must admit that his hit on Bastian was clean. Trouba shouldn't need to defend himself and then sit in the box for 5 minutes just because he landed a good, clean hit.