One of KDE's three overarching goals is to improve the Usability & Productivity of our software.
This goal targets busy and productive people with problems to solve. With that in mind, we strive to make KDE software present powerful and advanced features in a polished and easy-to-use manner, with sensible default settings suitable for typical users and common workflows.
Weekly progress reports are posted to https://pointieststick.com/category/usability-productivity/!
A development sprint for the Usability & Productivity goal is being held in Valencia, Spain, from 19 June 2019 to 26 June 2019. It is open to anyone interested, so se hope you can attend! For details, see Sprints/Usability & Productivity/2019.
In terms of the work, we are targeting specific pieces of KDE Software for this initiative. Here are the relevant issues for each of them. You are welcome to take a bug and get hacking!
Dolphin + KIO & Baloo frameworks