It would be nice if there was an option to sync files over the LAN since it's much faster. Especially if you have to transfer 10's of gigabytes of files.
This would be grate when you restore a computer and need to download all the files again. It takes forever if you have to download all the files from the web.
I guess Microsoft has thrown the towel on that... It's on discussion for a couple years by now, even if other cloud services do it with awesome simplicity.
Microsoft could hire some former Dropbox employees and ask them how to do it. ;)