I've yet to see a rational reason why a dice roll is better than the defined midpoint between a win and a loss.
See, this is interesting, because the actual thing that should be reflected, if "defined midpoint" is actually the goal, is the "defined midpoint" between a tabling and a modified win, because the Bye gives a full win.
The "defined midpoint" of a full win would be 56.5 points, so an MoV of 156 or 157, not 150.