EDA_MAINTAIN_DESIGN_HIERARCHY obsolete?

Unfortunately, EDA_MAINTAIN_DESIGN_HIERARCHY is not supported in Quartus Pro. It is only supported in Quartus Standard. 

The only way to preserve any aspect of the hierarchy is to create design partition assignments at the required levels of hierarchy; however, this is not a feasible approach for preserving the entire hierarchy—only certain levels can be maintained.

You can then use the quartus_eda command with the --partition argument to write out the netlist for the specific level.
https://www.intel.com/content/www/us/en/docs/programmable/683432/25-3/partition-option.html

Note also that if you create a simulation netlist for the top level then it will include the hierarchies with a design partition assignment.

Regards,
Richard Tan