@User: So, about power routing. For full automation, you could use a special PDN specification (check

libs.tch/openlane/common_pdn.tcl

) that only uses met4 vertical stripes, then hook it up to the existing "master" grid on its horizontal met5 stripes. The LEF file you get is written using magic

lef write -hide

which obstructs almost all of the unnecessary internal details of the macro on each layer, so that pins would be accessed, more or less, from the outside. For the last part of the question, that's not possible currently since the tools don't support a physical hierarchy (for physically flattening the design in the way you describe). Are you asking this in relation to LVS?