What cloud service are you attempting to connect to? I'm using my universities' box.com account - which generally has pretty appalling support (on linux at least). Zotero has managed this flawlessly.
Having never set it up with Google Drive, I'm not sure of anything else that could help your situation. In that sense your original point is quite valid then - this must be a quirk that still needs ironing out.
My system does seem to work pretty well, I just prefer it when things are very much plug & play. It stops you screwing anythign up, and makes it easy for non power-users to get things done.