I don't remember the music store, but I remember plenty of clothing stores such as Foot Locker, Victoria's Secret, and the Gap -- all of which are long gone. The Arizona Center was far more popular as an entertainment venue than as a shopping center and tried to shift towards even more entertainment after half a decade of operation:
https://www.bizjournals.com/phoenix/...16/focus1.html
Unfortunately, by the time that change in focus happened the original entertainment venues such as the sports bar and dueling piano bar had passed their peak and nothing added afterward would ever be as popular. Now, I actually think the Arizona Center could do better by adding some basic retail back to the mix. At the time the center opened, there wasn't the population nearby to support a drug store, for example. Now there is. I work across the street from the Arizona Center and sometimes the CVS at CityScape is too far to walk for an immediate need.
Regarding the inward-facing nature, we'll have to agree to disagree. It's a significant problem and will put the Arizona Center at a continuing disadvantage if not properly addressed. Sure, some people who work or live nearby know what's inside, but there are also many visitors to downtown who have no way to know there is a whole mall hidden behind Hooters. Likewise, I would guess that most hotel guests don't ask their concierges for help with finding restaurants. Some simply look for restaurants by walking around, and when faced with blank walls and loading docks, they look elsewhere.
Regardless of what happens with the retail component, the office towers of the Arizona Center are just as bad -- maybe even worse -- in terms of inward focus. On both Van Buren and Fifth Street, a person walking on the sidewalk has to pass loading docks and service entrances that should be in alleys or on the backsides of buildings. Instead, those back-of-the-house functions face the street while the main entrances to the buildings are located on the inside of the center. Those flaws are not easily fixed and will present a continuing challenge for the complex.