Note that by changing the "Color scheme" to "Line type" you can still make the layerview show the shell, infill, support etc in different colors. Also note that the layer slider now has two handles (or actually three).
If you drag the top blue handle all the way down to layer 1, you get a single layer view. Now click the grey area inbetween the two grey handle you should notice the layer number indicator aligning with the center of the grey area.
With the center of the slider selected, you can use Ctrl + Up/Down to view one layer at a time. If you first click in the layer number box, you can even leave out the Ctrl. Add the Shift key, and the view will bump up/down by 10 layers. You can also enter a number in the layer number box to go straight to the specific layer. Finally you can also drag the grey area of the slider.
The same also works for arbitrary numbers of layers at the same time. If you manipulate the center of the slider, the top and bottom should stay the same number of layers apart.