No, it is not working when the L5 is docked to it. there is an On-Screen Display to control the XL settings. That is a touch screen control, and that is working. I just need to get the drivers installed or properly configured for it to work.
The display and powering/charging the L5 is all working fine. My one complaint initially is with NexDock design. There is no space for a good palm rest. and I am not liking the touchpad on the rightside of the keyboard. Also, the touchpad sensitivity needs to be adjusted. It isn’t working smoothly. But, it looks like NexDock hands control of that over to the device. So, the L5 doesn’t have that (or I will need to figure out the gsettings for it). Everything about this seems to be custom designed for Samsung devices. Not much else.