I think it would be great to have the "Add to Catalog" action be background-able, since this can be slow particularly when scanning through photos on a NAS.
I think there's a few other actions, such as Moving and setting keywords, that I'd also like to be able to run in the background. Or maybe, if there is a UI dependency on these tasks, it could be doable to lock particular tabs instead of the entire app while non-background actions complete?
It's possible this is already under consideration, and anyway still loving my first few months of photo mechanic