I'd do anything I could to avoid including Madrigal and preferably I'd keep Stiever. But at the end of the day if it required giving up those two plus Vaughn for one year of Betts I'd do it. It would be a Kawhi Leonard-type move that may just catch the rest of the AL with their pants down and open up a lot more than just AL Central contention for the White Sox.
Overnight it'd remake this squad into a .500 team. And from then it doesn't take much accounting to start really finding extra wins here and there. Eloy doing it over a full season, Moncada & Anderson staying healthy, improvements from Cease & Lopez, Kopech returning with the stuff he's showing right now and the arrival of Robert and (provided he's not dealt) Madrigal. This is not to mention the fact that the Sox having basically nobody they care about due to leave the roster and ample assets to make some bullpen improvements. Is it unrealistic to see fifteen more wins there all tolled? Even with maybe a little bit of dip from Anderson, Giolito and McCann I can see that kind of improvement. I could see an even bigger twenty win improvement if Giolito sharpens up just a few things and Anderson stays healthy.
Without Betts you have yourself 85-90 wins. Close, but ultimately not good enough in today's MLB.
With Betts you have 95-100 wins. You're in the playoffs for sure and you're looking to do some damage. The Astros are losing Cole and their next best two starters are going to be 36 and 37 years old next year. They wont be chopped liver but they wont be an unstoppable behemoth.
Betts represents a real chance at winning a title. Maybe he'd be a year early than what you would ideally want but so what, this is your chance to get him cheap and it wont be around next year. If all that costs is our first round pick and some other farm players? 100% sign me up. I'd do that every day.