So, you’d like to have multiple libraries with independent sorting …
To work intuitively, first the whole current UI for sorting, in the preferences, would need to be replaced with sorting options in the views themselves. Hiding sorting in the preferences part of the application is unintuitive and slow, so this would be a very good improvement. After this, the sorting mode could be stored either globally or per library - but even if the per-library bit were not to happen, the improved sorting convenience might be enough.
Now I get the now-playing issue… That’s what I’d call a single album view. There’s definitely something funky about it, sometimes I get that semi-random album bar, sometimes not; The inconsistency means that there’s a bug somewhere. Whether the whole feature is welcome or not - well, I’d certainly also toggle it permanently off, the Audirvana UI already wastes so much space, at least on a laptop screen - and my mbp is a 15" model, things must be even worse with smaller ones.
This below is what I use as the now-playing-view, activated by the red bit. The green thingy launches a small album art viewer mode and the links in the yellow part can get to the artist or the album - which sometimes has that bar, other times not…
…and here’s the now-playing-album without that album bar… Better.
I’d like a “now playing” view which would stay in the original window and also be nice in fullscreen mode. In fullscreen, it could feature all the controls, good sized album art and the play queue (with just key details/columns) all in one. I’d prefer to activate it by clicking the album cover (green bit), which currently switches to the compact player.