"a complex array of issues" is a correct and usable phrase in written English.
It can be used to describe a situation or problem that is made up of many different and complicated issues. Example: The country is facing a complex array of issues, including economic downturn, political unrest, and environmental concerns.
Sophia Casson, an analyst in East Timor with the International Crisis Group, said camp inhabitants faced the problems of not only rebuilding but also of settling a complex array of communal issues.
Individuals with achondroplasia demonstrate a number of well-recognized anatomical features that impact on growth and development, with a complex array of medical issues that are best managed through a multidisciplinary team approach.
Prison program and health services often focus resources towards people detained in prison with a complex array of health and psychosocial issues that may predispose them to recurring morbidity and reoffending.
The modern-day college presidency requires people who, with the proper staff, can deal -- and who want to deal -- with the complex array of issues most campuses face.
Urban Bicycling, The wheels of fortune continued to turn in favour of the bicycle in 2015 even as proponents of cycling continued to navigate a complex array of political, cultural, and infrastructural issues.
"The reality is that for all E.U. states, a decision to accept Guantánamo detainees means confronting a complex array of operational, legal and political issues which collectively will prove hard to resolve," Nigel Inkster and Robert Whalley, both former senior British intelligence officials, wrote in the current issue of Survival, the journal of the International Institute for Strategic Studies.
(There are a complex array of qualifying circumstances and exemptions surrounding this tax issue, including the laws of the individual state involved, the solvency of the homeowner, whether the homeowner is in bankruptcy, whether the sale involves a primary residence, refinancing associated with the property, and a variety of other factors related to qualifying for the federal exemption.
Collaborative (or collective) emphasises the critical importance of collaboration in addressing all health issues and especially global issues which have a multiplicity of determinants and a complex array of institutions involved in finding solutions.
