All new players simply copy and try to mimic established old players. In terms of controls player is very simple and ergonomic thing, but in software world it do not work that way, unfortunately. I mean creating standard for player basic features: 1) playback, volume controls, 2) playlist features, etc… For example, default Playback controls 2 sets Shortcut and Alternate. If user wants to change ok, but defaults will be always available in every player after install. For example, default Playlist features: autoscroll playlist and show current track automatically, etc It can be easily done, but can it be implemented? If it can’t be implemented, discussion is pointless.
This isn't something that can really be done centrally, no. Not unless you make a media player framework with standardized controls that can be used in any app that wants to implement them. Feel free to build one. :) But such a broad request is not really actionable for a bug tracker.
We have such frameworks: https://doc.qt.io/qt-5/qtmultimedia-multimediawidgets-player-example.html Player basics and building blocks are always the same, but keybindings differ and ways of feature implementation differ. KDE is about unification and integration. Why not to unify this, so you have no conflicts in keybindings as has Amarok, no feature inconsistency. I do not talk about graphic design. If you look on Linux players, they are same, but here and there something is missing. Amarok lacks same things as Elisa, Kaffeine do not have simple shortcut to open Playlist, etc. Compare with VLC and old Winamp. Ubuntu includes VLC for the reason. It’s better developed than any KDE player in terms of usability. It’s not request. Just suggestion =)