What are your thoughts on the mockups ?
My take:
a) If the scene is quite empty, then taking the entire screen will leave too many blank area, no ?
b) Node names shouldn't be changed in the Save Data dialog. It's too dangerous
f) how about changing the format of the scene ? like the other nodes (see mockup)

b) If it can not be edited, it should not be displayed?
e) A dicom which was loaded into slicer should default to .nrrd format.
f) I do not understand.

b) it can be useful to have the name to give a hint to the user about which node it is. The filename should be enough generally, this is why Node name/type/modified would be hidden by default in my mockup
f) You suggest one-button saves, I suggest to add an entry in the menu in the file-formats column, to save in MRML(.mrml) or Slicer DataBundle(.mrb)... Selecting the Data Bundle file format entry grays out the nodes below the scene line like shown on the mockup

fiducial seeding has a new interface: you can interactively seed with fiducials or label maps. Parts of the panel change, depending which of the two you select. this could be a template for sdb versus scene.

f) fair enough. What options do you envision in sdb mode ?

Minimal, by its very nature. You tell it whether to save to disk or into the local data base, and what its name should be. That's it.

Fixed in 20332, 20333, 20372