If I change a property of any of the following processes and then generate a Tcl script that only lists the modified properties, the script is empty (the modified properties are not listed for the other two options either).
Generate Post-Translate Simulation Model
Generate Post-Map Static Timing
Generate Post-Map Simulation Model
Generate Post-Place & Route Static Timing
Generate Primetime Netlist
Generate Power Data
Generate Post-Place & Route Simulation Model
The "Generate Tcl Script" support was originally designed to support the main implementation flow only.
As such, the generated Tcl script can be used as a starting point for creating a project script but should not be used for revision control purposes where complete project settings are needed.