Two full days with the WD15 dock here now, and things are very stable. I haven't needed to tweak anything new today, and suspend/resume, and plug/unplug, "just work", as they should. Happy I got this dock for the power button on it alone. Too bad they didn't choose ASIX for the ethernet chip, but (with safeguards) the Realtek chip is fine.

The XPS 13 9360 notebook is excellent, with phenomenal battery life on the version I got (i7-8550U, FHD, 8GB RAM, no touchscreen).