OTOH if you need to have a wide DOF you don't really have a choice
You do - use focus stacking.
Depends. If you're subject is changing, focus stacking might not give you the result you want (i.e. grass waving in the wind). Sometimes the only way to get the shot is to increase the DOF.
ANY image like the one the OP posted should basically be completely in focus regardless of the camera's focusing system when shooting a 24mm lens at f/10. He doesn't even have to have his camera in AF or even look through the viewfinder as long as he's focusing a little beyond the hyperfocal distance. There is nothing significant in the foreground of his shot, so I'm assuming he's focusing somewhere at least beyond 8"- which would give him focus from 3'7" to infinity.
Not sure why focus-and-recomposing as an issue or the 6D's inferior focusing system came into play on this thread, or solutions like focus stacking with a distant landscape shot.