I feel the current save zones are a bit inconsistent, and also could be improved when on mobile/handheld devices.

New proposal:

1. Make save area UX the same on write panel, presentation panels, etc.
2. Affix save zone to bottom of viewport on handheld through to mobile devices.

Proofs of concept:

https://design-patterns.textpattern.com/mockups/content-article.html
https://design-patterns.textpattern.com/mockups/presentation-page.html
https://design-patterns.textpattern.com/mockups/secondary/content-image_edit-proposal.html

Open to feedback/suggestions.