First of all,HOLY SHIT the combat is atrocious.Its basically like skyrim combat but worse considering you have to drag your shield instead of clicking a button and attacking is even worse because you have to time your attack based on the animation that it plays.Instead of awkward weapon flailing:sword,axe,pike,spear and club should have there own animation instead of the main character flailing them around like he have muscle disfiguration.Also,add more damage to the bow,its lacking some punch like an actual bow.
Second of all,the campaign is so repetitive.Go from one point to another while slaying some dudes while getting a key to open up a gate so you can get a scarlet from adventure time(Haven't finished it yet because i was bored to continue the armory quest).Add some variety to your levels.Don't just throw different enemy type see what sticks.
These are the two main problem i found from the campaign alone.Really hope you improve the combat and the really edgy full caps story.
P.S:You should be able to attack while the shield is up,else the shield have no real purpose on the battlefield or at all.