I can even see why they want that change, but even just keeping the old icons as compat would have been good enough, I just miss the issue why on doesn't do that directly after the issue is pointed out.
GNOME business use cases don't get people using keyboard input so they don't care. In this case GNOME business use cases don't use KDE applications so they won't care.
In the most cases in KDE or Kate it will only happen if you trigger the interest of a dev (if it is no fatal bug) or you can provide some patch.
Search the internet for jwz cadt.