Hello,
If you could expand on the issue some more it would be helpful. I just going off of what I understand from reading your post.
When you updated to C1 v12 it should have kept all the output recipes from C1 v11. If you are using "Export" tool then you will need to input all new parameters e.g subfolder location, file type, naming, etc.
When you import images - you input "AuntSally" into the Description field?
When Processing select the recipe(s) that you would like. You use "Output naming" (change the output name only) tab. Change the Format field to "Current Date" or Image Date" _"Description" and this result in a file name of "20190131_AuntSally"?
As for subfolders, There are two places to create them. The first is in Process Recipe > File tap. This only affects a single Recipe. The second is Output Location this effects all selected/check mark recipes. Witch one are you using?
Renaming files with Metadata have not changed from v11. Try "Description" Token when using Batch rename if that is what you are asking about.