Thanks!
Import is indeed one of the first thing I’ll have a look at (though, luckily, a member of our community stepped up to support here, so it won’t be all on me anymore). But mid-term I’d also like to take closer look at building smaller theme-components or plug-ins for things like having an opt-in to display external media previews or automatically using grid view when people upload multiple images (I hope some of this ends up in core eventually, but my impression is that there’s a lot on the roadmap, so it might take a while).
And since we will self-host, I had the impression that it doesn’t hurt to have a bit more knowledge when troubleshooting issues (at least on the same level that I have for the current PHP-based forum).