What would be really helpful when using the chisel tool is to have a wire frame overlay appear on the block that will show you before using it what the block will look like if you used it on a specific corner, like a ghost preview of the block post action that you are targeting. That way you can see exactly what the intended effect will be before committing to the cut because getting that cut wrong and having to remove and replace is just so clunky imo.
Another way would have a separate mini screen open up when you are targeting the block holding the chisel tool, this screen will show the block and the outcome of any corner cutting you can simulate on that mini screen before doing it live, that way you can rotate and check its final result before hitting the “ok” button which will then commit that previewed cut to the live world on that block, this will let the builders fine tune the cutting if you want something more complex.
Or even a combo of both of those ideas, the wireframe quick and basic preview and commit or the “no I want to fine tune the cut” more detailed screen option.