MB,
I never played a lot of 3rd and I don't remember anything about it. In 1st a longer weapon would give you the first attack in some circumstances and if you could kill the the other guy then, obviously, the size of your stick did matter. But if you didn't then it was normal combat rules.
For us, dweebs who didn't know jack about how to use weapons or what circumstances they were designed for just took the glory-boy weapons. The battle-axe, the two-handed sword and so on. Had we seen more Chinese martial arts movies we may have had a different opinion about pole weapons. Plus we had this idea that they were too big to use in a dungeon crawl. Yet we swung our two-handers about with no thought as to how much room that would take.
Can you imagine that if somehow these medieval weapons were still the dominate tech today what message boards would look like? The whole voulge vs. glaive debates would make the 9mm vs .45 debates look calm and rational. And the magazines...Pole World, Poles and Blades, Pole Digest...maybe if we ask nice Harold could 'shop up a magazine cover.