Does not look so bad. It's similar to web interface on dropbox.com, but packaged as "electron-like" app. Its functionality is related only to Dropbox, and it can be considered a part of main application. If it was third-party crapware, like free-to-play game or antivirus, I might be concerned, but it's just a piece of new bad UI and not worse than that.

If I do "apt-get upgrade" and "gnome" metapackage installs me another new picture viewer/calculator/text editor appeared in new version, does it mean "Gnome silently installs unwanted software on users computers"?