I've long thought that would be the 'ideal', but it seems like a huge job to ask anyone to do - like writing a RB-specific version of iTunes.
Now that the downloadable RB sims for Windows are up-to-date again, I've gone back to using the sim to build the database (then copying the files onto the ipod). In a way the sim acts as a sort of "rockbox manager", as long as one can keep the build version up-to-date with the ipod itself.
On that note, am now trying to work out how to build and copy the pictureflow database that way.
Also, this in turn brings up a question about what has happened to the "WPS context menu" "open plug-in" option. Used to use that to open picture-flow, but I can't now find where to set "picture flow" as the WPS context menu plug-in. Something seems to have changed there.