New Banners + Banner Passive Tree Cluster + small side question

So with the reworked banners having
"Provides 5% more Area of Effect and 5% more Aura Effect per Valour Consumed at gem level 1, both scaling up to 10% at gem level 20."
and "A new Awe and Terror cluster has been added to the southwest of the Marauder's starting location. Awe and Terror provides "Banners also cause Killed Enemies to have 20% chance to Explode, dealing a tenth of their Life as Physical Damage", and "Banner Skills have 20% increased Area of Effect"."

Would the explosion chance become apart of the Aura's Effect? If so does that mean it can be scaled to 100% explosion chance via the built in Aura Effect?

Also "Apex Cleaver now deals 78-121 physical damage (previously 71-111). Its Implicit modifier is now "Hits with this Weapon ignore Enemy Physical Damage Reduction" (previously +40% to Maximum Quality)."
Wouldn't this have some serious issues with Grandmasters? A Grandmaster with this weapon would instantly kill anybody who doesn't have physical damage fully converted.(Which is significantly harder with the removal of many "Phys taken as" modifiers)

First part: No. It's not an aura effect so it won't scale, simply because of that.
Second part: Maybe. Probably. I don't care.