Dallas’s $275 million performing arts center is being designed and built by star architects Rem Koolhaas and Norman Foster. But trying to get the two to work together has been difficult. And the arts groups that will call the center home have little access to the two or their representatives. “This pattern has produced frustration among performing arts center staff and some members of the building committees, who complain privately about lack of coordination and their once-a-month access to the decision-makers.”