The selling point of Sevinne is that whenever its controller casts their first instant or sorcery from their graveyard each turn, that spell is copied
The flavor text for Bursting Beebles makes fun that they, like many of our players, went away when Mercadian Masques came out
If this cool cat sticks to the field, its smooth sailing to the finish line unless the entire pod focuses you at once
This extra draw power is what really sells Shantotto for me in Jeskai Control
Basically, the end result of our ranking is that we have two decks that rank among the worst Commander decks of all time (Sultai Mutate and Abzan Keywords) and three decks bunched together at the top of our rankings (Mardu Humans, Jeskai Cycling, and Temur Spells), with just two points separating the top three decks and Temur Spells edging out the field for the best Commander 2020 deck award
Once again, the burden of proof falls on the grader to prove a rare card is worth a higher value than the tier selected originally