This question should be asked in the MT or Drama forum. Having participated in both of those for years, and knowing dozens of people who have stayed there during Unifieds, I’d say, yes, it is definitely worth it for most to stay on the Exec. floor. I don’t think that anyone above who has commented has stayed there for Unifieds so they likely don’t know how convenient it can be to have the amenities on the Exec. floor, nor that going out and exploring Chicago in February isn’t the reason you’re going to be there. 
The snacks and drinks are a nice perq but it is also much more quiet on that floor during a time when the rest of the hotel is going to be a zoo.