I don't really see the point of this trade when we can keep Vaughn and just sign someone like Conforto for money. Not to mention that Kath has literally just started his career and hasn't been able to really build any value.
Are we sure Vaughn's value dropped? He held his own (and more for a chunk of it) for a full MLB season after not playing above High-A and played all over the field. Yeah, he wasn't Juan Soto, but he also wasn't 2006 Brian Anderson out there.