I would like to have a "spectator mode" for my arena deck.
Whenever someone is playing my arena deck, the game makes a sound, or lights a button to tell me, and I can go in Spectator Mode to watch how my deck perform, if and how it fails (or win).
I really like the arena, but I don't trust the AI
Note: I am not proposing to let us play with the arena deck, that would allow to set up unwinnable decks, just to watch.