I don't mind them experimenting with new ways of doing things at all, I just really don't understand why this needs to be done in a way that prevents people from doing things the way they've done it before if they decide they don't like the way you're doing things.
I switched from Konqueror to Dolphin after it handled what I needed. I switched from Virtual Desktops to "Activities" after it was also good enough for my needs. I never used widgets in their original usage (placed seemingly at random on the desktop) but use them inside of the task bar. I use sloppy focus follow mouse and mouse raise only on titlebar click so I can use windowed applications in actual nontrivial ways.
It doesn't matter if you glossed over that run-on paragraph above. tl;dr: KDE can have opinions, so can I. At least KDE respects that.