What do you like about the proposed design?
Clean and simple - consistent with the design principles used in the [reply] tool
What do you wish was different in the proposal?
It might be worth putting a similarly formatted box around the section heading (since being outside the bordered draft box will reduce new users' likelihood to entering it). I appreciate that
Can you compare the designs being proposed here to the current experience? Can you accomplish your current workflow for adding new discussions with this proposal?
This is relatively similar to the plain [add section] link that I use in WP and WV. However the main advantages when combined with the reply link are: visual consistency, auto-signing for new users, easier pinging. Currently, there's a non-functional when using [add section], where it asks what you want the edit summary to be, but it's autofilled and un-editable, so it'd be worth simply skipping that step.
What other improvements do you think would be valuable for us to consider making to the new tool?
Will it note to non-logged-in users that their IP will be public?