I think that the developers kind of sucked individual originality out of the mod starting with the "slots."
Ex: Polearms and two-handers take two slots (most).
With archery, now you basically have to be a pure archer to be effective. It's not just archery, though. Hybrids are almost impossible to do with archery, unless you want to be stuck with a Khergit or Strong Bow. Now it's like there are a few set builds for everything - a few builds for two-handers, a few builds for archers, a few builds for horse archers, etc. The ability to be a hybrid was kind demolished starting with the slots, and now with the basic requirement of archers to be pure archers to be effective. Before, when everything took one slot, archers could be less accurate in archery in exchange for polearm proficiency, two-hander, etc. Now you're stuck with one pack of arrows, or if you're using a War Bow or Long Bow, zero packs of arrows. The only viable hybrids I can think of are mixed melee weapon proficiencies, throwing + melee, or crossbow + melee (crossbow, light crossbow, and hunting crossbow).