Another thing: it would make wearing heavy armour/shield as a PC also more rewarding, imo. When I see that i blocked something, it feels more like I have succeeded and my choice of armour has an impact, and less like I was just lucky that the enemy missed.
Tanks really need to feel like tanks instead of evasive Rogues. I hate that Lae'Zel is shown as more evasive than Astarion when in fact it's her half plate tanking the damage.