Title says it all. The chance would have to be tuned for balance but it would make perfect CHs more exciting and would make going for perfect more worth it after all the upgrades are unlocked.
#Excellent Shields in Perfect CH Chests
urban elk
fluid pebble
I like this idea. I'd think that it would work where it has a chance to take the place of a mega multiplier, meaning you can get it even without having all of the rewards unlocked
urban elk
Yes that’s exactly what I was thinking
split rampart
Inb4 Excellent Kishar Shield +1 without options
cyan ibex
I like this idea but shield chests are still too rare to show up all
brittle canyon
This idea adds slightly more of them. 
grand kindle
Title says it all. The chance would have to be tuned for balance but it would ma...
I was ngl thinking of suggesting something like this myself but then forgot the idea
Nice!
As well as like a way to get excellent swords easier(doubt its needed since the ascendant badge boost exists
fluid pebble
it's called Ring of luck + BS3 + ascendant badge boost
grand kindle
Bs1:
spark remnant
Bs1 is better