Does anyone here understand how the new BBpress works like how to add plugins to it etc?

I'm trying to use BBpress as a forum solution integrated with WP and Buddypress.

BBpress is no longer a stand alone board script instead it works as a WP Plugin.

Does anyone know:
1) How to add any of the user plugins to it or are they all obsolete now?

2) How user add a new "Topic" as I see no Add New Topic button on the forums I've created.

Finally, do you other users or staff members use another board solution that integrates better and is more user friendly like SMF that you can recommend to me?

Thank you!