Don't know how a graph can be flawed. How would you change it to take into account advances in technology?
The trend is downwards from the mid-70's because of the things you mention. Even looking at the years from, say 92 - 14, you can see at a glance that last year wasn't terribly unusual even taking into account the overall decline from 92 - 14. "It's not out of the range of the trendline of typical years since since 92" might have been a better phrase for me to use but it's less snappy. To some extent I felt it was fairly self-explanatory. "Downward trend, 2014 not unusual" perhaps.
Here's a more telling graph, IMO. It's the number of commercial crashes year by year, rather than deaths. I must say that I'm probably more interested in how likely I am to crash rather than how many people die with me. 2014 certainly doesn't stand out.
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Vin