infomon
Smash Scientist
Well it sounds like you've given good evidence that shields all decrease at the same rate with respect to damage given. So no, there isn't any "extra" advantage to having a big shield. Although if Bowser's full shield was the same size as Kirby's full shield, that would be very dumb and Bowser would be useless. So yes there is a point to having a bigger shield...
Also the bigger shield could be used in rare circumstances to protect one's partner in doubles play.
Also the bigger shield could be used in rare circumstances to protect one's partner in doubles play.