I’m in favor of a smaller GUI, if not but for a larger viewport space to work in while maintaining a decently sized “content” area. As far as Unity assets → UE4 goes, I believe that Unity assets are licensed for use in Unity only, if I am not mistaken. As far as creating prefabs are concerned, I highly agree with this, and have been asking for it for quite some time now. I should be able to create a prefab (.upack) file that is saved in “…\Documents\Unreal Engine\User Content”. Another move would be to relocate the Unreal Projects folder into “…\Documents\Unreal Engine\Projects”. The Vault section in the Launcher should monitor the User Content folder like it does the VaultCache folder as well.