The bitching about having to sort e-mails and manually add filters? You have to manually add people to circles, too. And what happens when someone who's not in one of your circles shares something with you? At least currently, there's no way to filter them based on anything.

"But we can just add filters to Google+!"

We already have filters in e-mail.

I feel like I sound like a grizzled old man ("we used to code uphill both ways in the snow!") but I really don't understand how G+ is superior to e-mail.