I would buy the set of if didn’t include the ST. It’s inclusion actually lower the value I perceive it to have.
Lucasfilm making us buy stuff we don’t want just so we can get stuff we do wouldn’t be anything new. See: the 2011 blu-rays that only included the coveted OT deleted scenes in the more expensive I-VI set and not in the IV-VI set.
Not to mention IV-VI were the SE. I bought that set first day it was released but have actually watched the movies in it so few times.