user group as the owner of workspaces and segments

I don't know if it needs to be a user group, but we definitely need the ability for people who make a segment/metric to be able to share/transfer ownership without having to have an admin do it.

Yes, anything that makes ownership management easier is plus...The default behaviour of creating any metric or segment is for yourself to be the owner... which for me as an admin is exactly what I need... if there was a way to make the owner a "group" it would have to be done in such a way that it doesn't impede current workflows (i.e. I don't want to be asked each time... but maybe a checkbox and dropdown to select the owner group in the editing screen could be used?)

Having the ability to have ownership groups would make it easier for teams to collaborate.. but it would make managing groups more onerous for some orgs (I basically have four groups... Prod Access - which everyone gets, QA Access - which devs and qa and data lake team get, Web Services - only for people who need Report Builder and Data Feed access, and then the default "All" which only the core Analytics team gets so we can see all the newly created suites before they can added to the other groups)... for me, I certainly don't want every user to have full ownership of components... so we would also need the ability to prevent this functionality.... or be able to identify which groups could even be eligible... like maybe I would create a "Marketing Team" group, and allow that to be selected, but not the "All Prod" group.... 

As Mandy said, the ability for non-admins to pass ownership would be nice... but still group ownership does open up collaboration... I think it just needs some more thought into how this could work without also causing a lot of potential issues... 

It may be easier to allow a Workspace project owner to add co-owners rather than increase the workload of product admins by having additional User Group.

I agree with @mandygeorge that an interesting option would be to allow users to transfer their own assets (but not take away an admin's ability to do so), though I can see where this could go off the rails. For example, someone transfers their assets to a dead account because they are mad at the company, or transfer assets to someone other than who the organization wants. Adobe would need to add this as a permission so that organizations can exclude the feature if they want.