According to this chart, the temperature decrease appears asymptotic. Keeping in mind that average oceanic water freezes at -1.94 degrees Celsius, and that according to this site...
I think you're right about this. It's juvenile buffoonery. Chaotic Stupid; as one person here put it.
Anyways, I would consider Emperor Palpatine and Darth Vader the epitomy of Star Wars villainy. Smart and ruthless.
It is an alien language. It could rely more on minute vocal stresses than on actual phonemes.
Or anything else, since it's all made up in the first place.