@Colorfulstan that address just one of the issues that you raised…
Paired with the behavior, that the file picker then opens on desktop, instead of the last opened location, makes it a really bad user experience if you want them to upload multiple files for example
And regarding the multiple file picker, I already mentioned on May 19 that currently there are no plans to support in multiple file picker. The reason is that we prefer to wait and do it better, from scratch. But it will take some time.
Is this feature (multiple file picker) is critical for your app?