Back to the archetype we are building!
Protective Arc 1 Action Feat 8
Archetype
Archetype Great Sword
Prerequisites Great Sword Dedication
You have practiced enough to not only protect yourself but your friends. When you take the ready shield action with a two handed sword, when an enemy attack you or an ally with in your melee range, you can use your reaction to do a shield block to reduce damage for either yourself or your ally using your sword.
Thoughts?
Throat Punch Games 
I love this. It gives you a chance to block when you specialize in two-handed weapons. And protect allies which is a boon.