On the factory suspension the shocks are part of the limiting factor, even though they are already long.
FWIW The Bilstein shocks supplied with the Superlift kit limit travel by way too much. Great shocks, wrong length.
On mine I'm not expecting the shocks to dramatically change my articulation.
If your existing shocks are not the limiting factor, then there should be no difference in travel.
I will have to further extend the brake lines as well as extend the wheel electronics.
I run +6 brake lines and extended all the electronics and breather hoses by about 10", plenty long enough now.
What I am really expecting out of the shocks is some more positive dampening and more control over wash boards at speed. I am expecting speed bumps to stop the rebounding faster. I am also expecting less clunking as the shocks max out in top and bottom travel. Also any further reduction in dynamic rolls would be nice but not expected.
I can't speak for the Fox CD shocks, but my Fox Emulsion shocks are very frim, but not uncomfortably so. They have helped with body roll, and definitely provide much better dampening when off-road, I no longer bounce when the weight shifts. Overall, I'd say they are a little firm for the highway (but the CD will help you out there), but excellent off-road. The reservoir should really help for the washboard stuff.
I went with 11" travel Emulsion shocks and the fronts are pretty much exactly right after using JKS stud mounts, could have maybe gone with 12" ones in the rear, but as I'll be adding the Poly rear shock brackets, it will work out perfect.