I'm thinking of resuming my "The Bug of the Day" series
In the first few years of G+I used to have series of writings called "The Bug of the Day" where I tell stories about things that bug me (tech-related bugs) which included not only the discovery of software bugs but also my efforts to figure out why some hardware failed to work (and how I finally managed to get them fixed).
I think I stopped around the time G+ had its last major revamp of its interface, and even before that I started to see one by one of my followers stopped logging in (some actually said they hate the new interface and preferred the 'classic' look). For me it's not the interface itself being the problem; it was how G+ unnecessarily changed things around. You know, fixing something that ain't broke, or changing for the sake of changes.
I personally like the classic way of managing circles where circles were visually presented in a drag-and-drop interface before being downgraded into 'lists' reminiscing of the one found in Facebook. In fact I held the classic interface until its last moment when the new (current) interface were forced on everybody. Circles has always been what G+ is all about so if that was taken away then G+ stopped being what it was supposed to be. It didn't stop there; adding new people to circles now automatically add them to the default 'Following' circle. If you want to move them to other circles that would require more clicks (back then you could assign them to any circle right away and changing circles also can be done by a simple drag-and-drop). Maybe Google thought by introducing Collections it would keep some users in and bringing in new ones but the damage is already done (though I really like Collections). Uploading pictures in the classic interface was also fun back then. If you want to see how it was done back then try changing your Youtube banner.