To me it makes sense that there are two ways to “lock” a detail.
1 - “normal” object lock that locks it’s position on the layout and
2 - “the detail lock” that locks it’s point of view.
(And I repeat the wish to only lock the aspectratio 
)
But if you lock the details access to editmode then a lock object state should IMO be added to the detail panel so it’s object lock status can be unlocked and locked there too.
But my biggest hurdle with zooming in on a detail and then enter the edit mode (double click) is that it is hard to get out again. ESC doesn’t do it and if there are many hatches or objects in the view it can be hard or impossible to double click to get out again. So adding a “quit edit mode” to the panel would be nice, or add a 2xESC feature.
To reproduce this do as follows:
- Make a layout
- Zoom in on the default detail so if fills your view.
- Double click to enter editmode
- Make a rectangle and hatch it.
- zoom in on the hatch so it fills your view
- now how do you get out of edit mode?