When it comes to selecting media for a post (this could also apply to selecting media in any situation) can we have a "select all" option?

We tend to have folders of images for individual posts (especially those detailing installations) that this would be incredibly helpful with putting those posts together. It could also help in any situation where you want most of the contents of a folder, since you could select all items and then deselect the ones not needed.

It wouldn't be so bad if you added to your selection items by clicking on items, but this just replaces your selection - you have to click on the small checkbox in the top corner (which actually moves when you hover over the item) which makes it a little more fiddly than it needs to be.

Or being able to shift-click or command-click to add to a selection for block / selective additions. That'd be the best outcome, as most people are used to that from... well, everywhere else.

But, in general, any of these would improve the UX considerably.