Turning on patch locate in order to be able to use Normal ground type, yes definitely still recommended with any coil. Extra Deep cuts ground noise really well, but does sacrifice some sensitivity. So really depends what you are after.
I was recently working a really noisy gully with the 17x13" - reactive clays and big patches of charcoal. Was using Difficult, General and had to get my sensitivity down to about 6, but it was still a bit too much and doing my head in. I switched into Extra Deep, and it ran beautiful, and I was able to get my Sensitivity back up to 9. I knew I may miss some smaller targets, but in this instance I really preferred the smooth running. Didn't find gold, but I did dig two deep .22 leads and one shell casing, so I was happy knowing I was getting good punch.