Do you mean all those commands?

For "Add" and "Remove" are a pair of opposite actions. "Delete" is something else. At least in one other Git client I saw "Track" instead of "Add" and "Untrack" instead of "Remove". Would this have been better for you?

Please try the 17.1 preview and use Interactive Rebase - it also is available for the HEAD's history in the Log window.

It's already there: just use a .gitflow file www.syntevo.com/doc/display/SG/Git-Flow#Git-Flow-Configureflow.commands.configure.

Please make clear in your screenshot what master, origin/master is and what the feature and feature/origin are.

It is very easy.

Way 1: sort the file list by State. Then the conflicting files are all one beside each other.
Way 2: (temporarily) unselect View|Show Stages Files, e.g. by using the corresponding toolbar button.

Why do lots of GIT branching papers use a horizontal layout? I think because it's more intuitive and compact (because text is naturally drawn horizontally).

Because in a text document a horizontal graphic needs less space and because the commit message information is not shown.

This could be dangerous if you are in the wrong branch and have already started with a new feature (e.g. created a new file) and then want to switch to the right branch for commit - bang, your changes are lost. I don't want the user to blame us for having added such a dangerous option.

For Git repositories this will be implemented in 17.1 preview 5.

This is expected because | only works in shells. You would have to run a shell script that performs the desired command.

Please contact smartgit@syntevo.com if you need to get support. This is rather for feature requests.