I have different folders with images with different aspect ratios, sizes and quality; so sadly, there is not "one fit all" 'Sizing' option that works for all.
Can you add an option to set different Sizing options per Folder?
Being able to rotate or shuffle between different Profiles would work too.
This is currently on our feature request list, so I've added your vote to it. We'll be sure to let you know if/when we're able to implement it in the future.