It doesnt remove what you already have, but its a great way to lock the number in place
Both Yorion and Brago serve as great flicker deck Commanders, so it really comes down to a matter of preference
The controlling lead-up to those finishes makes it highly engaging for players of all skill levels, which proves to be quite fun most of the time
Fetch Lands help you get all your colored dual and Shock Lands, thinning out your library, engaging shuffles for manipulating your library with cantrips and fuel your graveyard for various mechanics and cards like Delve threats, Wrenn and Six or others
It draws you cards, it has a way to double up on your best token, and it also gives a buff to your whole board
The deck also includes some targeted reprints to further play opponents off one another, including Curse of Opulence, Disrupt Decorum, and Kazuul, Tyrant of the Cliffs