Problem with trading Skenes, or anyone like him, you virtually never win the trade. He's already the best case scenario outcome for anyone you get back.
Skenes wont be dealt yet, but if Pittsburgh was even mildly in the mood to do it ... Yesavage, Nimmala, Rojas, Roden, Stephen.... thats probably closer to what a realistic return might be, but still feels light given how much control he has left.