Hugh wrote:

Compared with Scrivener (say), Ulysses has no real outlining tools.

How do you outline in Scrivener?

So the sooner the application can import OPML sheet by sheet, from (say)
OmniOutliner without going via Scrivener, the better as far as I'm
concerned. I'd been hoping that the latest version might include this
feature.

As someone who uses Ulysses and recently upgraded to OmniOutliner Pro, I'd be very interested in that!