Thank you - I'll try it out again. I had exactly the same feeling about KDE5 - too fractured, too inconsistent, too many weird options. GNOME just was more polished in that regard. But your post makes me hopeful that KDE 6 fixes these things :)
Overall I'm just happy that Linux has multiple competing DEs which often inspire each other and give great new design ideas. As long as we have GNOME, KDE, Cinnamon, Budgie, Pantheon etc., I will be happy. I have learned lots of things in regards to my design preferences (and about quality of design in general), and I'm glad knowing that I can switch DEs anytime. RIP for Windows/Mac users who don't have thus luxury.