It depends on what stage in the Capialism -> Socialism -> Lower-Stage Communism -> Higher-Stage Communism -> Fully-Automated Luxury Space Gay Communism -> Whatever comes next.

Essentially, having places to get goods in small, compact areas is probably a good thing, but in Socialism or Lower-Stage Communism it would make more sense to have them be one large store, or specialized stores. The myriad different brands would not need to exist in competition with one another, regular stores would exist and eventually Money would be phased out in favor of Labor Vouchers, or some other tracker of Inputs and Outputs.

However, Germany is Capitalist and is Imperialist, we aren't looking at the People's Mall, here. Not only that, but it's an American themed mall. Marx obviously would not be a fan of a Capitalist Shopping Mall in any manner.