Idina will always and forever be my favorite Elphaba, but lbr she struggled vocally even during her Broadway run as Elphaba.
I've heard her perform several times on Broadway when she was in the role, she sounded nowhere near as crummy as she does today (or in this video). But I don't get a seasoned Broadway legend can sound sound so terrible on every live televised performance. It doesn't make any damn sense.