Although Emert's transformed Hades form does cause further cards to be exiled instead of getting re-used again in the graveyard, there are plenty of ways to avoid the downside while still reaping the rewards
You'll want to include a bunch of Forgotten Realms and Baldur's Gate cards with dice rolls, and having an Unfinity attraction would allow you to buff your commander each turn
Two, the change would affect all players
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Icon of Ancestry is also a great reprint, as most tribal decks want to run it and most tribal cards like it keep value for a while
Plus, if your Commander dies, it hops back outside of the game, where you can just buy it again although at an extra 2 mana for every time its had to vamoose in this way
