I recently came across an interesting article on the Warhammer World Championship held in 1989 in a very old edition of GM magazine that I had back in the day (long story why I came across this which I don't need to replicate here!). What really caught my eye was the "gamey-ness" of the winning army. The winner (and this is no criticism of the winner BTW - one works within the rules as presented) played with a 7 cannon army! Now if one has played 3rd edition you will know how deadly cannon are. Personally I find the 3rd edition rules for cannon to be poorly written as there is no need to check for range which makes no sense - that did come later in White Dwarf 147 or thereabouts - it is in the rules for the new empire army that preceded 4th edition. I plan to try these amended rules out in the next month when my undead army will be ready to fight my Bretonnian forces.
One other thing to note is this - from what I can recall 3rd edition WFB competitions forbade the use of flying troops. These are the very thing that can negate war-machines such as cannon. I also seem to recall a limitation on wizards to second level magic - again a limitation that favours war-machine heavy armies. To me this is the antithesis of the oldhammer movement. Would love to hear your thoughts on this and I hope you enjoy the article (apologies for the size of the file - I want to make sure it is readable!).