The NeighborFinder has been updated at 2018 to return measures with the near values. But does it?
It would be great if it worked as documented, and I vaguely remember using it in the Beta. I don't see any new output attributes null or otherwise. I see a lot of hacks in FME Hub for LRS_* operations, (none of them very appealing). I did find a workaround using PointOnLineOverlayer. I assume the extra parameters on NeighborFinder were meant to do the same without an overlay.
Is there a way of getting a measure on a Route without chopping up the line?