Damage shielded in postgame? + Mastery recounts like Stoneborn

Is there a reason we don't have damage shielded for supports, in the post-game screen? Not to sound catty or anything. It's just that it records a lot of things, down to stuff like true damage. Is it just not possible to record accurately in the game?

I think damage shielded (actually sopped by shields, not just shields given) and I hope I'm not alone for wanting a Mastery recount, too-- Stoneborn and Ardent Censer have one which is really cool, I'd like to see that on other items and masteries.

Is this the right board for this?