Uhh, so we're supposed to be happy about a variable bitrate and quality because it saves them some bandwidth? This isn't a feature for users it's a spin on a feature for the corporation.
yes, because it saves you money - netflix could be increasing its subscription cost, or it could keep it down as the subscriber base grows, by using technique like this.
As long as you don't notice the difference, what's wrong with them saving some bandwidth?
Therefore, a technical solution is the next best option.