I have a 2017 with KDSS. I test drove many times, both KDSS and non-KDSS, and went for the KDSS. The ride on the road was noticeably better to me. Can't speak to the off road aspect, as I've only driven my KDSS off road.
XREAS and KDSS are two different systems. XREAS gets in the way of most mods, from what I've read, and talking to mechanics and people that own it. KDSS much less so, certainly won't matter with what I have planned or have already done. For example, suspension kit with about a 3" lift was easily accomplished. Planned sliders may require unbolting a bracket or two during installation. A few companies don't make a KDSS compatible version of sliders, but plenty of others do.
Either way, have fun with the new ride.