In the context of a super soldier running down a mountain and then jumping in to a descending drop ship, I really don't think either of those Elites knew what was coming for them. She jumped in and out in about 5 seconds. In the context of the situation it is not crazy at all.
The action, acting, animations, and music were all great. My only very small complaint is the last 5 or so seconds at the end before the cliff jump when it looks like they are all kind of floating because there isn't any displaced snow when they run. But in the grander scheme of things, who cares - it is a video game and it looks amazing.
I am going to guess that their introduction will be a stark contrast to Osiris. It won't have to be a 'whizz-bang-boom' killing fields cinematic. I expect more of a surgical, heavy force for brief intervals expression of power.