That's an amazingly deep observation, given that he's only standing there for 1sec and holding the sword up. Plus, it's during heavy snow and he's likely facing an intimidating foe.
Ans to add, he possibly just begun his training in Jedi arts, so it wouldn't be weird to see him not being a lightsaber veteran that doesn't show any emotions.
Man I wonder what sith Kylo's chasing. This sith lord in this movie is probably going to serve a purpose close to Darth Maul in the pre quels. They should introduce Valkorion & the eternal empire.
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<blockquote class="twitter-tweet" lang="en"><p lang="en" dir="ltr">Also, we have confirmed ‘Star Wars: The Force Awakens’ runtime as 2 hr. 16 min.</p>— ScreenCrush (@screencrushnews) <a href="https://twitter.com/screencrushnews/status/654386847720833025">October 14, 2015</a></blockquote> <script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script>