Actually putting radio URLs into playlists in the host is not a great workaround because the remote does not get track information, which is huge to me. When listening to radio I very often want to know what it is I'm hearing.

A very useful feature would be the ability to delete tracks remotely from the host. Very frequently a song comes up in shuffle play and I say to myself "This is crap, I need to delete it". Being able to do so from the remote would be great.