The only downside is that if/when your mana dork gets removed, you also stand to lose your biggest attacker
Since token decks have the potential to go very wide, doubling the number of tokens you control is amazingly useful
Gray Merchant of Asphodel drains the table for your devotion, Coat of Arms turns a wide board lethal, and an overrun effect ends the game out of nowhere
Durability-wise, these sleeves are middle of the pack
This five-mana red and white planeswalker comes in with four loyalty, can create 3/2 spirit tokens, allows you to Discover with a value of four - which means you can cast the next nonland card in your library with a mana value of four or less for free - and lets you exile cards from your graveyard to gain mana, then cast those cards if you want to
If I play draft or sealed, in between rounds, Ill sort the cards Im not currently using