Erivo takes exception to her soulful eyes being "erase[d]", and by extension, the erasure of her entire being. Seriously? It's a movie poster, not a personal boudior portrait. The character being portrayed in the poster is Elpheba, supported by her best friend, Glinda (played by Ariana Grande). The Broadway poster sets an important scene focusing on the relationship between the two characters. There is the sense of closeness, of course, but also confidentiality, conspiracy, and with just a hint of a smile (and with obscured eyes), a sinister plot being hatched. Less is more.
What exactly is happening in the OG movie poster? With Erivo's face in full view, choosing "to look down the barrel of the camera to you, the viewer..." those eyes, beautiful as they are, "communicate" nothing of the relationship, or the scene the two characters are in. In fact, it looks like Elpheba is not even paying attention to what Glinda is whispering in confidence to her, and by looking straight at the audience, it's like Elpheba can't wait to spill the tea for us. Besides, Elpheba is not a fourth-wall breaking character like Deadpool or She-Hulk are (unless she is in the movie?), so if Erivo is promoting anything in the movie poster, it's not the movie, but herself -- especially since she is so perturbed by a fan edit that she takes so personally.
When you're in a movie poster, you are not you. It's distastefully unprofessional for a performer to put themselves above the production they're in. Get over yourself.