Yes, I think the UI designer (or developer) overlooked human tendencies. Eco is commonly understood without thinking about 'mode' vs 'range' which sound subtle. Range is clear but mode could mean 'range' as well in peoples minds... case in point.
Plus if they used eco the transition from Volt owners would be easier <grin>
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Off topic but I can't resist. That's actually a pretty weird UI.
• In a good UI, the affordances and status information easiest to notice and easiest to (in this case) touch should be the largest -- and most obvious -- in the display. In other words, they should be the first things you notice. On this display, the most obvious things are the four fan direction settings in the center of the screen. But think about it: how often do you change those? I mean really? I rarely if ever touch such settings in my S. If you're like me, then you might consider such an arrangement out of place in this car's UI, and if so, then the whole display's layout collapses and we have to start over.
• As for the seat heater icons, are they highest in importance? Do they deserve to be at the top?
• What is difference between FAN ONLY and ECO?
• What is difference between ECO and Comfort?
• What does the "AUTO" label mean on the seat heater icons and the recirc icon?
• What does "Climate Power" mean?
• Can you press the 20% green ball next to "Climate Power"
• What does the snowflake ON mean, and the heat icon OFF mean?
• One thing this display has over Tesla's -- in terms of climate controls -- Tesla's are small and reaching to touch various settings often results in error. At least stuff is bigger and more touch-friendly on this other car's screen though the layout leaves much to be desired.
And (back to being on topic) I drive in RANGE MODE all the time, like always.