Unless you are connecting, who's going to hang around the airport to use the arrivals lounge. If I have meetings the same day and enough time to use the arrivals lounge, I'd just as soon check into my hotel early and use what are usually much nicer shower facilities than they have at the arrivals lounge. If I was UA, I'd lose the Arrivals Lounges and put in a few more IFLs with shower facilities that can be used by both arriving and departing passengers.

Does anyone think UA should maintain separate Arrivals Lounges outside of customs and security?