@ Jan
I’ll answer the questions with a yes or no as requested but I’ll followup up with additional details.
- Yes.
- Yes.
- Yes.
- No.
- No.
- Yes.
1 thru 3, You’ll need the Link extension for Connections. Optionally you may want the [Form](http://connections-pro.com/add-on/form/_ extension too. This would allow frontend editing instead of being limited to the users edit entry profile admin page. Login is handled thru WordPress so you can use any registration/login plugin to handle that feature. I do have a free no frills Login extension available.
One thing to note Connections does not handle or process user registration or verification. There are many available plugins that specialize in this feature set.
SEO is included. It is constantly being tweaked and changed to meet the evolving best practices.
5 and 6, most users use a membership plugin such as Restrict Content Pro. Membership plugins also can handle the user registration and verification as well as limiting access to the directory page. The levels/roles set in the member plugin can be used to limit if a user has permission to add or edit their entry by setting those capabilities on the Connections : Roles admin page after those roles are set in the membership plugin.
Hope that answers your question thoroughly.