Ricardo, I'm not certain what you are referring to. Are you asking about the Shadow and hightlight warnings? The on/off buttons for those are now in the uppper left (shadow) and right (hightlight) corners of the histogram.
If you are referring to something else please describe where those are.
> "With out Highlights, using the Recovery Slider is a guessing game"
I don't use those checkboxes / buttons. I hold the alt key down while using the "Exposure", "Recovery", and "Blacks" sliders. I find this gives me a clearer view of their effect (in combination with the histogram).