Definitely agree about those nice touches. Just a few thoughts from my experience as of late.

- Window management wise the new tiling controls/keyboard shortcuts added last year have replaced third party tools for me. It's not as customisable as rectangle or moom but it covers halves and quarters which is mostly all I need. Additionally the "arrange" feature is nice letting you automatically tile N most recently used windows in a given layout.

- For window rules you can right click on an app in the dock and under options assign it to the current workspace and it should reopen there.

- 3rd party software like BetterTouchTool can "throw" windows to other spaces. But it did feel a bit hacky from memory (small but perceptible lag)

- The new spotlight features coming this year look quite promising for keyboard driven workflows.