While I found The Verge’s post interesting and agree with their suggestions the one thing I find missing most of all is sharing INTO G+.
Right now it’s impossible essentially from any 3rd party experience. It’s 100% absent on iOS and possible only from the system share intent on Android which is great, but there’s much more … content we consume all around the web can’t easily find it’s way onto G+ from apps and extensions in the same fluid manner as, well every other social property.
More here – How to improve Google+ immediately | The Verge.