While it might start as innocuous as allowing creatures to attack with impunity, it quickly snowballs
I often run into players who have dozens of these things kicking around their house
If you don't mind a deck that feels more directionless and asks you to adapt on the fly, you'll get on with this deck just fine
If something copies one of these tokens, the copy won't have haste, and you won't exile it at the beginning of the next end step
Even so, tales of the Chaos Orb live on, including a myth of a player who, about to lose, shredded his Chaos Orb into pieces so it rained down on the opponents cards, destroying that players entire set-up (and theres a subsequent myth that the card-tearing player was ultimately disqualified since destroying the card resulted in a deck that with fewer than the required number of cards)