I already have lower shock relocation brackets installed when I did the Rock Krawler Long Arm.I don't have any experience with that bracket, but here is my opinion.
When using that bracket you should also use the lower relocation bracket. That should put your shocks back into a relatively stock-oriented position, so your ride quality shouldn't be affected much. On top of that, if you will be ordering new shocks, you would be able to run a longer shock and get more use out of your suspension.
Getting more travel is the game plan considering the current set up maxed out the shocks that I had.