if you have enough archery/powerdraw you can hit their heads/feet with your arrows, even if they hold their shield up.
EDIT: and: you want archery nerfed more?
Then have the shield-hitboxes reworked.
Everything is fine as it is.
If you want to annoy 2handers/polearmers you go archer. if you want to kill archers you go shielder. if you want to pissoff shielders you go 2hander/polearmer... and the circle is closed.
EDIT2: and if you want to be a shitretard³, you go horse-crossbower.