I think the underlying issue here is not so much the default shortcuts that Tinderbox installs (choosing shortcuts isn’t easy), but that it doesn’t provide the full menu item for many important commands so that we can reconfigure them.
Unlike, say, Scrivener or Devonthink, where all the navigation and move options are available in first-class menus, so I can change them to be consistent, Tinderbox only allows you to change Indent and Outdent. 
An example: the standard MacOS shortcut for ‘quick and dirty bullet list’ has been opt-tab for 15 years at least and I use it all the time… Except in Tinderbox, when opt-tab is hard-coded to ‘next panel’.
If could, I’d remap ‘next panel’ (or whatever the command name is) to Ctl-tab as in Scrivener and DT, but I can’t, because there’s no menu item.
There’s related but not identical issue with the move up / down commands. The standard shortcut cmd-up/down works in the outline (but it’s only in the context menu). I asked Mark a long time ago for the ability to move up and down the outline while you’re in the editor, and he did (cmd-opt-up/down) — for which I was duly grateful. But because none of these commands are on the main menus (cmd-opt-up/down isn’t even on the context menu), I can’t configure them to my standard cmd-ctl-up/down.
These are only a couple of examples, but there are a few others and they add up to a little bit of friction every time I use TBX.
Just to be clear: I don’t have any problem with the shortcuts that are chosen. The issue is that there’s no way of changing them, when there would be if they were menu items in their own right.
. Cmd-[/]) so going back to the original topic, you could do Enter cmd-] without having to type in a title first. But you can’t rebind TAB, so you might as well learn the shift-enter shortcut…
[PS: I’m deliberately not mentioning that in the outline every single time I find out the ctl-n/p don’t work in the list as I know most people don’t use MacOS’s very helpful emacs keys and it’s probably a wish-too-far. They do work in the Inspectors, though.]