The module inserter doesn't change the modules in building ghosts, it seems like that is something which it should.

Often I find myself placing a blueprint and then after the fact wanting to change the modules in the buildings. I am then forced to wait until the bots construct it before I can change the modules using the module inserter.

If there are already modules in the ghosts, the vanilla upgrade planner can change one module request into another.

Using Module Inserter to add additional module requests to an existing ghost without any would be a great feature.

This feature is included in my new fork: https://mods.factorio.com/mod/ModuleInserterEx