I 200% approve of the kill cam and companion cinematic disabling.
Kill cams when you play a sniper are pure waste of good crits and buffs, there are perks that allow for extra crit chances, spread removal and so on after a kill, but if after your kill there is a kill cam by the time you have re-focused your aim on the next target all those buffs are gone.
There is something that I believe might be a bug, but if it's a feature I would like to suggest changing it : when you equip a companion with a helmet that has a bonus on skills that bonus doesn't apply. It makes no sense specially when you consider that skill bonuses on armor on the other hand apply to your companion so why not helmets ?
Another thing is the fact that some helmets show slots for mods but I've never been able to add a single mod to them even the mods that state they're for armor and helmets
Finally this is a feature request and not a bug : When you are crouching and ask your companions to hold a position they stop sneaking and walk there then stand there in plain sight, I would like them to stay in stealth as long as you do even if you asked them to stand their ground somewhere. I play a stealth sniper and watching my companions walk in front of my enemies when I try to stay hidden is maddening.