I have a strong preference to be in control of when EV range is utilized, but I understand why a company would choose to simply the operation. They don't want service calls from people who didn't RTFM, or inadvertently pushed a button and didn't realize it.
My engineering solution would be to bury the controls somewhere so that the option exists for those interested enough to find it, but too obscure for someone to clumsily mess with. Heck, I might even have a code that must be entered that is found in the manual in the section relevant to the operation of that feature.
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