My suggested solutions are only to help you migrate to Windows 10 from your current setup today. However I'm probably mistaken about the built-in queued file transfer feature and mixing that up with the ability to pause. But like I said you can just keep using a third-party program and you're already using an explorer replacement with that feature anyway.
Edit: It's also worth noting that large and/or complex file transfer operations are usually done using the command-line. And Windows actually has a built-in CLI tool (since Vista) called Robocopy that can apparently queue up transfers and more. So Windows 10 technically does have this feature but it's not the kind you're looking for.