A while back I mused on using Weapon Speed and its weird, weird rules in my next AD&D session.
I'm leaning towards, "Not this time."
A couple of encounters have some special considerations that I think will complicate the Weapon Speed rules. Because of such, we'll have rules no one is really familiar with faced with exceptions, which I absolutely know will cause time to be spent arguing if it's X and Y then it should be Z even if the module says it's really not-Z-at-all.
Similarly, I don't think it's the place to use Weapon vs. Armor Type adjustments. Probably not, anyway. I'll have to take a closer look. I suspect it'll feed value into a couple of players who'll closely examine the rules and leverage their weapon choices vs. the enemy, and give the others one more modifier they don't know and have to deal with. It'll also make a joke of one stated tactic in the module, too, which isn't really a good outcome, either.
I might have to save those for some other situation where I feel like they make a lot of sense to drive play decisions, yet don't add too much complexity in the process. That might not even be possible. It's clearly not a good fit here.