Obviously Kane knows what it is he is trying to do. But I'd like to take a stab at what his post is trying to get across, with regards to Archery.
I believe that Kane is posting the information part of the update post as helpful hints/reminders to himself. He is writing in Kane short hand. Or as I would call it a run on sentence/thought.
If you take the first sentence and apply it to the second sentence I think you get the answer.
Kane means to add/change the special attacks on Bows, and in doing so he wants the Special Attack damage to be based on a players real Archery skill + bonuses from augments, and gear. The use best weapon feature is N/A in this equation. So, if you stack swords and have a bow with use best weapon you will get the special attack damage according to your Archery skill and not Swordsmanship.
Like I said in the beginning, I could be wrong. But I think this is what he is talking about.
--Sturger--