Its unfinished because its not balanced yet.

About the fact you could enter and complete the maps its been accessible for 2 months now, so as far as I'm concerned until they put out a patch note saying 'Searing Desert is available'

You are to blame for your own actions.

Edit: Yes I have long since finished it and have no issues with completing broken content and not receiving prizes. I know all to well what I was doing, thus I side with Tynon as a player can easily tell what content is finished/unfinished.