That use to be the case but they hired a new chef and upgraded the menu.
See here: (Dining out with Rob Balon: The Oasis review)
I took my sister, her family and my brother there last saturday night and the food was great! They were up from Louisiana for one of my daughters graduation and were totally impressed with the food and especially the view. A true Austin treasure is gone.
I'm glad to hear that the food had improved recently. I have a feeling that they will rebuild soon.
I'm jealous. I wish I could go again.