Eriette turns auras into classic C11 Vows... but, the Vows never really did it for me. They just weren't strong enough, and the Impetuses that debuted in C20 are barely playable.
Does the end step trigger redeem Eriette? Hard to say, but I think that clock is going to be very, very slow. It doesn't help that most of the Cursed role things are in blue or for your own creatures, and token auras just aren't really in w/b. Second, with the full cycle of Swords of Protection and Value out, there's some nonzero chance they're playing a protection from White or Black sword that just... could remove your auras.
You can play Eriette naively and enchant your opponents creatures with cards like Battle Mastery and
maybe they'll consider attacking with the restriction, but at the end of the day, you'll be spending resources for an agonizingly slow clock that will almost certainly get answered. And when Eriette does get answered? All the benefits you've heaped on other players' creatures can come crashing down on you.
The other way to play Eriette is to pretend her first ability doesn't exist, and just play w/b auras and this is just gravy for your strategy. But, it's not much gravy. You could just play
Killian, Ink Duelist for the ramp.
While I like the card in a general sense, I think there are practical limitations with the current card pool. It is simultaneously too fragile and too awful. (All this in mind, Eriette is apparently the second most popular Orzhov commander on EDHREC, so... maybe I just don't get it.)
