"Fallen Angel is a trope seen all over pop culture. Redeemed Demon is not" You aren't implying that Magic never does anything unique are you? I have more faith in it than that.
No, the question was why we’ve done one and not the other. We’re more likely to have hit popular tropes than something that isn’t.
Why have we done Mad Scientist and not Monkey Barber? Because the first is a trope meaning everyone including us is more aware of it and thus thre’s more demand for it. That’s all I was saying. (And yes, now I’m going to start getting requests for Monkey Barber.)
We do plenty of original things. Maybe one day we’ll do a redeemed demon. It just isn’t something anyone has asked me for before today.