No dumb questions!
I do plan to support the new widescreen assets from the Unity ports, and using the Unity IWADs as sources in general, but I'm waiting to see what exactly the next release of GZDoom (4.5, probably) does to support these. Once that's out I'll do a WadSmoosh 1.3 release that piggybacks off that.
I'd like the map authors to only be visible if you're playing an IWAD level, and filed this feature request for it https://forum.zdoom.org/viewtopic.php?f=15&t=69424 but unfortunately I don't think it can be disabled for now.