P: Include additional metadata in XMP (flags, collections, VC's, etc.)

I'm assume after the steps is completed you can resize your smart object raster image to what you need in your layout and then it will do a better job of scaling @200%?

This still hasn't been fixed It's been over a year!?

This still hasn't been fixed It's been over a year!?

No, sort order is not stored in XMP.  In general, anything relating one photo to another (sort order, membership in collections, membership in stacks) is not stored in XMP.

Hello I just want to ask also if the customize or sorting of photo in the catalog are also save on XMP files?

Yes, the workaround is discussed above. How the artwork is imported into your document will effect the success rate. It's clunky. I hope Adobe fix it soon and I can rely on Generate. It has plenty of other problems, the most significant being lack of sRGB support for all the files it creates (making them useless for online use).

Anything?

I've just found a way to generate raster smart objects @15739213 or @11199216 with Generate Image Assets! It's ridiculously simple and still hard to know!!

When you drag and place a raster image in Photoshop, it automatically converts to Smart Object. But that automatic smart object will not be exported to higher quality even if this is originally big!

The solution: Resize the automatically generated Smart Object to 100% scale. Then convert the automatic Smart Object to a Smart Object again!!! That's it!!! The next time you generate the asset, it will recognise the real image size from the automatic smart object!

I know it sounds stupid, but it really works!

Yep, this is still an issue and it's a pain to work around, especially now with retina @11199216 requirements where old documents designed for @1x to be 50% as a workaround now have to generate @11199216 at 150% or we stray into weird 33.33333333% territory. Working at 100, 200 and 300% just makes way more sense.

Generate doesn't yet produce sRGB images either, so it is far from ideal for producing web-ready assets.