The 250,000+ deaths mentioned in the article are not due to heat getting cut. It's due to people with weak immune systems (mostly elderly) trying to economize by setting their thermostats low, which makes them marginally more susceptible to influenza and other illnesses.
Lower energy prices --> less incentive to economize. An old person dying of a preventable seasonal illness isn't as newsworthy as other types of deaths, but yes it still counts as a tragic human death.
While I was vacationing in the UK, I was surprised to see the resort meter my suite's energy usage, and charge me for it when I checked out. Of course hardcore environmentalists love those kind of policies. (I didn't mind so much... aside from the slight hassle, I guess it's better than assessing an average charge to wasteful and thrifty people alike.) But for immune-compromised tenants, it does give them an incentive to place themselves at marginally greater risk of dying.