Bull .
If US consumer spending moderates, who will occupy all those fancy retail stores?
Amount of retail square footage per American has quadrupled in the last 20 years or so.
If consumers consume less, there WILL be less demand for retail space to sell to consumers.
If you build retail space in strip malls or malls to lease and that comes online in the middle of a retail contraction, you won't lease them. It doesn't matter what your balloon payments are 5 years down the road, or even 5 months down the road, because you can't make even the normalized payments.
If you currently own a retail property, like a mall, and one of your tenants goes under, you will have to work REALLY hard to replace that tenant. Either you will go without the rent, or have to bring down your rent to get it leased.
Either way it hits your cashflow.
To be certain, refinancing troubles work into it, but that is not the only cause of the coming commercial defaults.