While I understand that weapons are supposed to shrink to prevent clipping when sheathed, spears, in particular, not only have disproportionate shrinking where the bottom of the spear remains large (normal size even?), but the top part of the spear is shrinked to such an extreme degree that it looked like an arrow.
In AC:Origins and AC:Odyssey, spearheads have usually maintain their size, only the shaft is reduced in length. This is important because most of the details of the spears is focused around the spearhead, and if that isn't visible, there is point in designing different spear if they're all going to be reduced to the size of an arrowhead with the details barely visible.