The keyboard shortcuts are a major pet peeve of mine on Linux. It wouldn't be technically hard to make the default text editing/WM keys use Super, but I think that Windows-style and Emacs-style shortcuts are too much of an ingrained assumption at this point for it to be feasible to offer system-wide Mac-style keybindings too.
The trackpad woes are a clear priority for some members of the Linux community and I can visualize a future in which trackpads work nearly as well on Linux as they do on macOS. Offering consistent Mac-style keybindings everywhere (maybe through a GTK setting, like switching between Windows-style and Emacs-style?) seems like a harder problem, especially because of the politics and ingrained assumptions.