View only permissions for share link (no download option)
I would love to see a feature in share link settings that would block/remove the download option. Useful in cases where you want people to be able to preview photos for example, but not be able to easily download them. This wouldn't stop tech-savvy users but would provide some friction against the average user downloading things you may not want them to.

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Vamplock commented
I actually have a situation right now where I need to show photo ID's to a governing body in my home city, there is no need for them to store that information they just need to see it to approve a mandate. Having the ability to create a link that could be password protected, time limited AND view only makes perfect sense. This would be a great help to me right now.