I think it's a bit extreme to recommend avoiding the X entirely because of the shudder. It really only shows up when you floor the accelerator, and even then it's only a minor annoyance at worst. If you drive like a normal human being you will almost never encounter the shudder, except maybe when accelerating on to freeways.
My 9/19 X shudders with AutoPilot accelerating onto the highway and suspension in Low. It’s non performance and I have it in Chill 99% of the time.
only time it won’t do it is on very low.