In most cases I want the overrides list not when i'm at the usage, but when I'm on the declaration. e.g.

    virtual void start(const QString &executable, const QStringList &arguments = QStringList()) = 0;

When you have this function declaration inside your class declaration it would be helpful if all implementations can be shown.

Furthermore it would be cool to have a action which loads the entries of this list to a persistent list... maybe inside the sidebar or in the search results, perfect would be the C++ symbol search

This action could be triggered directly via a shortcut, or a second F2 when the unpersistent list is shown, or even from the context menu.