In this moment (including Plasma 5.10) when mouse is over the Pager (any its desktop) only I can see the list of opened application(s). In my opinion would be nice to have possibility to choose application (from displayed list) to focus on it/raise it, instead of find it on task bar.
This would be very easy to do, are you interested in working on it?
I'm sorry. Taking into account I'm not experienced in programming in Plasma/KF at all - it would be not so easy for me to learn all of this, I think. To be honest some time ago I programmed a bit with Qt4 only. And second case is I'm not a student, I work professionally, so I think I would not be able to find enough time to work on it. I hope you will find someone who could implement this feature. And thanks for quick reply :)
That's fine, just wanted to give you the opportunity since it seemed like a nice way to get involved (scatching your own itch, etc.).
*** This bug has been marked as a duplicate of bug 368659 ***