So, what should I do ? I am ready to start fresh and install again KDE4 after formatting my laptop. However, will that really bring the expected relief ? KDE4 end of life being at the end of August, does it mean I will have to deal with KDE5 in a few months from now anyway ? If it is the case, I prefer to keep working to overcome the current issues, avoiding by that extra installations.
The KDE Software Collection has been updated to KDE Applications 14.12. The KDE developers have started porting their software to KDE Frameworks and Qt 5. For a list of the software that has been ported see the announcement. When a KDE Frameworks port of a KDE application is considered stable, it is released with KDE Applications and development and bug fixes are no longer applied to the Qt4/KDE4 version. This means that as ported versions of applications are released, we will switch to the newer version. At the same time, we are getting rid of KDE module prefixes (e.g. kdebase-konsole -> konsole). The result of this transition is that some packages will be using Qt5 and some will be using Qt4. We are working hard to make the transition smooth for KDE4 users, but things might look different depending on your configuration. Please adjust themes and colors as necessary for the two toolkits. See the wiki for help. We also recommend switching to Plasma 5.2 which will be released this week. Please report upstream bugs to the KDE bugzilla. Feel free to CC me.
What this means is that you’ll have to end using plasma, but you’ll have to setup it yourself. You can’t stop the transition (so installing kde4 will be useful until the transition is done, but after that, you will have to use plasma).
I’ve stopped using Plasma myself because it was too buggy for me (and I was eager to test Enlightenment 0.19 )
My advice is that if you can bear with Plasma as it is, go for it (you’ll have to tweak the configuration a bit to get a nice desktop, but it’s not that hard, check the Arch wiki for Plasma).
On the other hand, if you need a rock solid DE, maybe now it’s time for a change, that’s up to you.