I was on the Liberty in March and yes, Guy's burgers are much better than the old ones. The toppings and the beef are what make them better. They are still twice cooked in order to keep up with the demand but are quite good. They have a wide variety of toppings at the toppings bar so you can load the burger up however way you like it. I personally thought the fries were very good and not over salted or seasoned.
I had a number of them, without buns, but I did like them and all of my group, who could eat the bread, also loved them.
Now the Blue Iguana burritos were another story. They were OK but were always "luke warm".