Not sure I see why it would make any difference.  The number can be chosen so the odds are exactly equal with a "more than" or a "less than" bet.  Since the lucky hash creation includes the output number it's not like any bets even in the same transaction will share a hash (thus allowing betting in a given range).  At a first glance it just seems like it would make the calculation/verification more complicated without really adding any value.  Is there some other reason for the request or is it just cosmetic?