I have seen this post of yours before on the [Age of Empires 3] forum section but I did also create a post back in July on this section of the forum, where I suggested that a new general unit called the [Staff Slinger] could be trained from [Siege Workshop] building and serve as an early siege unit during the Feudal Age.
A unit using a lacrosse stick could serve as a unique version for the [Staff Slinger]. Though a problem with the lacrosse stick is that it wasn’t really a weapon for warfare but a tool for a sport meant for settling tensions between tribes as stated by yourself.