Filing the barrels would certainly be one option - you could do a number of things to "tart" them up - at the moment I am happy to use them straight out the box.
As to the rules, I now have 5 of this series, so I guess I can get along with them :-). The mechanics are nice and simple so you can get on with the game. One thing I will do at some point is print that QRF off the Osprey site - saves time if you can have the blunder or advantage table readily at hand.
What Daniel does not mention, is that this series is an adaptation of Ral Partha's Chaos wars (well, the core mechanics are there - unit sizes, movement, hit divisor) and I've enjoyed those down the years.