That would be nice indeed ! even more BMD soft/hardware are missing some resolution modes or settings, Yes, it is true, old legacy hardware has only interlaced "features" but near the end of the analog "time age" different consumer devices came with options for new hardware like DVD players or beamer and LCD screen support,
to get optimal quality from analog tape devices one can set for progressive mode over component video output,
which is slightly better than composite or s-video, which are only available in interlaced mode,
for example, the the Mini Converter Analog to SDI converter, only supports interlaced, this converter would be a nice option to record analog video to a hardware recorder, if that recorder supports progressive mode which the Video Assist doesn't "do" also..
So... yes it would be nice if Progressive mode would be supported throughout the BMD hardware, also because de-interlacing is only supported in the Studio version of Davinci Resolve.
btw. I am using the Panasonic
DMR-ES35V combo recorder, it has component (YUV) video output which is normaly interlaced, but can be switched to Video with component, and after that, you can set it also in progressive mode, there is no need to use the DVD deck in that case.
this combo has steady video output over composite and s-video also,
no TBC needed for stabilisation with the Intensity Shuttle.