The animation is obviously rough, and it was unfinished. Many on the team wanted to give Sara Ryder some spotlight since Scott Ryder was in the last few trailers, that's why it was insisted the footage revolve around her. Thing is, her model wasn't as far along as Scott's in terms of specific things like animation. These things continuously get ironed out and iterated on, and its since improved. Her face had quite a few animations that weren't even implemented yet there.
Some things like that scene and sound effects, etc were unoptimized and picked by...more technical/design members than cinematic or artistic members who know what to put and not put into public footage.
That showed a little. It's unfortunate because Bioware's an easy target on here and it'll get spammed everywhere regardless of the situation or context. And to be fair, they need to be more aware before putting this stuff out to the public.