Hey @mirkokaufmann
For your userstory 3 maybe this could be interesting to you: https://github.com/flownative/neos-workspace-preview
@christianm wrote that just recently. It is not released yet but you can use dev-master meanwhile (like I do). There is also no documentation (readme or so) available. Just as quick info: The package “injects” itself into the workspace module and provides actions for creating a preview-link (admin restricted by policy by default) and another action to copy the preview-link.
Greetings,
Peter