I can't imagine that it was unintentional. It has worked that way for BST since at least 2008, which was when I made Swiftur. I do think it is weird that 2hb is affected negatively considering how many really good 2hb items have BST on them, kind of a kick in the teeth. Like myself, I believe most oldschool BSTs have known about it seeing as they itemise around it. I specifically passed on 3 or 4 spines to alts because the hit rate with 2hb on BST is abysmal compared to 1hb. That is a big reason Daenar got super excited when he got traek dagger when he already had a spine a few years back.What stands out to me immediately is the amount of single attacks with the 2H is much higher than with the 1h weapon, either mainhand or offhand. It seems like something is being improperly applied, unless the AAs specifically favor 1h versus 2h set ups?