Once you find ways to start breaking that mold, say with Amulet of Vigor, Oblivion Stone, and now Kozileks Return, thats when the card starts looking busted
First, WotC could tweak how the bonus sheet is implemented on MTGA: They have done it in the past, although it really seems extremely unlikely to happen here
Aside from the fact that its definitely a metal band, its a twelve mana 11/11 with annihilator two
Champion of Rhonas also benefits from haste and untap effects, so she's a good inclusion in Samut, Voice of Dissent decks
Akul the Unrepentant Bladewing the Risen Bladewing, Deathless Tyrant Boltwing Marauder Dragonlord Kolaghan Immersturm Predator Kolaghan, the Storm's Fury Malfegor Swift Warkite Vampiric Dragon
That said, it is still a powerful inclusion that is particularly good at ruining a Vampiric Tutor during the draw step when they draw their tutor target