The GNOME developers are preparing to reintroduce a rating system for GNOME Software, but nothing as simple as the old one. It will be a complex way of rating the applications so that users can make informed decisions.
One of the things that has been missing from GNOME Software is the ability to rate applications and users have been asking for this feature for a long time. Some of you might remember that this feature used to be present in GNOME Software a long time ago, but it was removed. The reason was quite simple: the rating system was not good enough to clearly mark the apps.