We are deploying a few new companies in Epicor this year, part of a distribution network where the companies will share a lot of commonality and are part of a parent child structure.
I have created DMT files to import almost everything and use DMT playlists to load it all. While I am still refining this process, I have found I need two playlists as I have to do some GL Control Code updates manually.
If you needed to create a one new company, this would not be a good solution.