Feature request: DHW recirc loop model cool-off

[sisray921]

First-- I'm hoping this is the right space to put this idea... If there's a better place, I'll be happy to post it elsewhere.
I'll describe the study and the (apparent) problem I had in getting the CSE results I wanted.
I was studying DHW recirculation on a residential project where the DHW heater is far (~100 feet) from the fixtures. This is not uncommon with ADU development where the projects want to run DHW from the Main House below grade to the ADU (there's a significant code compliance element here forcing this kind of approach, but that's background) Typically, these systems incorporate an on-demand recirculation system.
I was studying the energy use of this kind of DHW setup relative to a compact one using a tankless electric unit. So, in short, studying where there's energy parity between Efficient Heater+Long Distribution vs. Inefficient Heater+Compact Distribution.

To the question:
I set up a model with some DHWLoops and DHWLOOPSEGS and BRANCHES. I noted in the results that the DhwMFL meters didn't really change across the hours in which I was studying. I had the recirc pump operating several times a day to correspond (roughly) to the hot water draw profiles, and I was hoping to account for the temperature of the return water to the Heat Pump Water Heater.
I concluded that the conductive losses in the hot water supply/return lines is assumed to be static (the hot water temperature assumed constant), since this is good enough for most multifamily systems as a rough approximation. In my case, I've got a long insulated supply line and uninsulated return line running underground, so I expect the conductive losses to asymptotically approach 0.
Assuming I've got all of this correct, it's probably non-trivial to add this level of analysis, so I include it as a 'feature request'. Not important, just thought I would throw it out there.