Please have a look at version 8 RC which comes with a new Push to Gerrit action if a Gerrit remote is detected: https://www.syntevo.com/doc/display/SG/Gerrit

For version 8.1 (preview will be available after version 8 has been released) you will at least be able to Commit during Rebase.

In the Preferences, section Commands you can enable Use font configured ... and Show line length guides. Isn't this what you are looking for?

This is actually something we are thinking about, however there are no concrete plans yet. Once there are, I'll let you know.

Can you please give command line example commands for one complete "cycle"?

Done and published :)

You as author should be able to edit. When you have the topic opened, on the right side there should be a menu box, including Edit and Delete. Is this box present for you, but no Edit there? I can change the topic myself, if Edit is not working.

Please elaborate in more detail where SmartGit's GitHub integration should be improved or what is not working as expected.

I don't have access to a Mac currently, but you have switch your entire OSX to Dark Mode. Have a look at e.g.: http://osxdaily.com/2015/11/26/enable-dark-mode-mac-os-x/

When you switch your operating system to a dark theme, is SmartGit showing up properly in dark? It should.