Given hi-res artwork was frequently done with the fringing in mind, a simple color mapping would almost certainly look bad. Would be nice if someone that had one of these RGB cards would speak up either way, although I imagine they didn't sell many.
Meanwhile, the ROMs for the Mountain Clock and Thunderclock are 403 Forbidden on the Apple II Documentation Project so I can't implement those yet. I shot the contact address an email, hopefully he'll fix things up.
I added the AE RamFactor clone of the Apple Memory Expansion card; couldn't figure out how the 5 MB expansion is checked yet so it's limited to 1 MB still, but we'll see