It would be nice with a slider to control the various auto perspective correction options in the "Lens Corrections" section (off, auto, level, vertical and full).
The main issue is that many times they will crop away important parts of the image, which of course is unavoidable. Therefore it would be nice with a slider to control how much correction you want so it is possible to get some slight perspective correction while being able to keep important elements in the photo.
Also, in general the UI for the lens correction options look quite awful compared to the rest of the UI in the Develop module. It isn't very self-explanatory what the buttons do.
Maybe do something about that awful tooltip about the alt button as well... not sure if it can be replaced by a checkbox and altering how things work under the hood?
The main issue is that many times they will crop away important parts of the image, which of course is unavoidable. Therefore it would be nice with a slider to control how much correction you want so it is possible to get some slight perspective correction while being able to keep important elements in the photo.
Also, in general the UI for the lens correction options look quite awful compared to the rest of the UI in the Develop module. It isn't very self-explanatory what the buttons do.
Maybe do something about that awful tooltip about the alt button as well... not sure if it can be replaced by a checkbox and altering how things work under the hood?