Desalination has been treated as a subset of recycled water. It does use similar technology, but everything else about it is different (and worse). I'd like to see it separated out from recycling. There's the interesting issue of whether cancellation of it might damager relations with partner agencies, but I also wonder if there are people in those partner agencies that have the same concern that I'm expressing.
There are apparently some water rights issues related to water recycling. Not sure I understand that yet.
Finally, I would like to better understand how flood analysis is done. I think that might help understand natural flood control and how climate change effects on snow line might affect flooding. I'd also be interested in seeing predictive uses of flooding models.