The rear sway bar is a skinny biatch. It's there to enable you and I to tow a simple small load to the tip on the week end or a caravan if needed.
If you don't tow then get rid of it - or disconnect it - but don't try and tow without it as the Grand will be a "Lose Lady in the Rear End". (eg - all over the place)
Disconnect the front sway bar (bigger dimension bar) and guess what? No real direct steering and "Happy Hippo" hour - rolls and wallows big time.
Short answer - the front does the work. The rear stops "bump steer and directional load steer". Serious of-road work like the Rubicon then disconnect it. Drive it on a daily basis and like the handling? then leave the thing connected until just before that serious trip, then disco it.
But consider quick disco's of your choise or budget for the front.
HTH