Aftershock is pretty lackluster... can we talk about replacing it with a more skill-based thing?

I feel like it would be a lot more fun to be able to, while you have a shield, intercept projectiles. Combine it with an additional shield based on max HP and you could have an extremely impactful keystone with lots of skill expression.

Edit; Or adding this effect to guardian. That would work too, but might overload the keystone.