Thanks, Ivan, for those tips.
I should add that originally this problem arose because the last time we play (months ago), I could only find an electronic copy of the Revised rules to hand out to my players. This time around I managed to find 2nd Ed. Rules in PDF to spread around, so that problem is solved.
Secondly, when I put the various options to my players, they all voted to play straight 2nd. Ed. Rules, so my proposition is moot at this point. Clearly they do not understand the subtle difference between a one-hit and a two-hit Battleship! Arg!