In DTM, it should be possible to copy Data Elements to other Properties, also in bulk (like it is now possible with Rules). Tedious and error-prone process right now. Thx!
PLEASE, I would also like for whole properties to be duplicated. This seems like a super easy thing to do backend-wise and an obvious necessity for templating web properties, especially for clients that have a lot of sites.
Better than duplicating everything and ending up with endless and uncontrollable manual work (with dangerous risks for your sites), couldn't DTM provide something like the "Library" Feature in Tag Management System Tealium (Ensighten has something similar) where you can define a standard set of Data ELements, Tags, Rules etc.. in a central "Library" Property. These are then available for all your single websites (Properties/Profiles) and when you change them in the library they change for all sites. Very very useful and extremely time-saving and complexity-reducing. With DTM for larger clients, I just end up in an uncontrollable mess of tons of documentation and unnecessary manual work.