I'm obviously with Hawk here.
Scale is scale. Six minutes is what gives parameters to how units move on the map. That is why a tank can move "X" amount of hexes each turn.
Fifteen minutes was discussed as "battle time with breaks in between"? If the scale was that the tank would move two and half times more hexes?
You guys fudged the scale to help include all the irrational units that you added.
Team scenario designers did not embrace scale so that they could make a scenario that covered "days".
"The object of life is not to be on the side of the majority, but to escape finding oneself in the ranks of the insane."? Marcus Aurelius, Meditations