There's no way she's a mainstay, Chester's son is upset about her being chosen, and within days of her arrival she's already in hot water over defending Danny Masterson. Tbh, I think as a woman, she should be able to hit all of Chester's notes, but she doesn't. She's flat on every single one, and has little to no emotional conveyance.
We're talking about a man who could hit Adele note for note, it's going to take someone special to replace him. I think the band needs a manager or producer to take charge at this point, because Mike Shinoda's not doing a good job. They also need to bring Rob Bourdon back, and replace Shinoda if they must.