Right click, I do not know, I'm on lxqt. My not very educated guess on the kdepim in general is that it is a balancing act, what portions of kde to let forward, and what to wait on. Hopefully most of the problems will be found as it has started landing in unstable, but some bugs will probably get through if you use KDE for your contacts, email, etc.
The right click is probably not due to the kdepim but another portion of the basics of KDE. I haven't seen anything on #debian-next. Peace out.