Every track shown as its own album art, with the title and artist underneath and the running length in the corner. Scroll through your library the way a record shelf works — by cover, not by text.
Switch to list and the same library becomes rows — title, artist, and length in a compact line. When you already know what you're looking for, list gets you there faster than artwork ever could.
A playlist is compiled from whichever Macs are on the network at the time — each contributes the songs it has, in order. If one Mac is asleep or off the network, its songs are simply skipped rather than breaking the playlist; the rest plays in the order you set. Bring that Mac back online and its tracks slot back in automatically.