So after more than a year of discussion on pretty much the same topic, this still has not been resolved. Sugesting that issue will be resolved in the next version of software is somewhat unacceptable, and if you try to imagine this in any other profesion, you will agree, it would not be tolerated. We just designed a house for you and although it says its 200m2 it is acctually 150m2. But don't worry we can build another one for you and it will now be 200m2.
When storage gets limited on computer, there is something starting to happen with all computers, that cause them to overheat. I am no computer genious, but many will agree this is just what acctually happens. So basically I had 500gb SSD and becouse of this issue I am acctually using only about 100gb, becouse the rest is taken by files I do not have on my computer but rather on Dropbox online, yet still it makes the rest of my disc unusable. So not only this feature is completely useless, might as well have files on my computer in the first place, it also damages my computer.
I had similar issue with Box before, now Dropbox... amazing.