Just to be clear, this project is not tile set over sheetrock or any manufactured cement panel.
I just got back from delivering 1000#'s of mortar for the walls
The mortar is applied over the stucco netting to a thickness of between 3/8" and 3/4" depending on the condition of the wall studs.
With a mortar bed installation you can correct any surface irregularities. Out of plumb or square surfaces become flat and level.
Also because of the density of the mortar and the waterproofing behind it, this is the best method to produce a "Lifetime" installation.
Done right it will outlast every other surface of a home.
KT