1. add a second level to the Deflect Arrow perk allowing well timed shield bashes to knock away arrows that might have missed the shield.suggest Block level 60 to attain perk.
2.add tower shields that allow total coverage against arrows and have double armor rating of normal shield, but weigh as much as main armor piece ,with possible minimum Stamina requirments.
3.add a sling weapon for those who want ranged attacks but don't want to use magic or bows.The main strengths being it is lighter and fires faster than a bow but, does not do nearly as much damage. For ammunition I'd suggest adding an option to stone quarries to mine stone for the Houses or stone for the sling.

If you like or dislike these ideas let me know, and if you like them enough i will suggest more at a latter time.

keep in mind i meant these as either part of a bigger DLC or in a patch.

Sounds like Captain America.

in a good or bad way?

I would also add the ability to roll. The combat would become much better

I like that idea ,keep in mind that you can stealth roll .