In some cases you can take a step towards some of this by splitting your Shortcuts. You can then group actions and call them via one run shortcut action. That effectively locks the group, collapses it, and allows it to be moved as one action. Certainly not perfect and not applicable in all circumstances, but it does allow reuse and is an approach that you can utilise in the current release.
As for step by step debugging, we’re beholden to the time honoured approach of popping in a quick look or show results wherever we want to check. Again not ideal but probably the best general use option for now.
Yes, that would be handy, but there is a also a workaround for this:
Make a shortcut with your favorite actions, arrange them in the order you like and then just add one after the other to the favourites. The shortcut also syncs to other devices.
I just had the idea of combining folders and tags. If you tag multiple shortcuts with the same tag, automatic grouping of them like a folder would be quite nice. And if a shortcut has multiple tags, it is also shown in multiple tag-folders.
This way, the people wanting folders would be happy and the people wanting tags too
So the way this would work, hypothetically, is that tag(s) would be applied in the action’s settings (where icon and name are edited) and the tag selector would appear under the search field but would usually be hidden as is the case with the search field. Tags would obviously be the system tags, not specific to Shortcuts.