I'm not quite understanding this one.
The other one, could be great, if you can do it in bulk. Like, if you have a shyt-ton of some flowers that you don't need for anyone's upgrades and you actually get useful upgrade materials out of it. It being RnG still tho...ugh.
What don't you understand?
Let's say you don't want to farm Oceanid. Let's say you farmed the shyt out of the fire flower for Diluc or something.
You can change the fire gems into water ones. Boom, no longer have to farm Oceanid.
As far as the other one, I have no idea. They discussed it during the live stream but gave literally no info. They said the fun will be discovering what you can get from it. So they were intentionally vague.
Fred.