At least in Plasma, this is not at all the way we've approached it. If you try Plasma Active you'll notice that Nepomuk is, well, non-noticeable even though it is key to many of the functions of the user interface. We have/had a plan for how we wanted to us it and we have been executing on it.
I understand that if you've invested enough time and energy into making up your mind that you dislike something, that it can be difficult to accept someone is succeeding with that idea ... but I invite you to try Plasma Active on a tablet device and see for yourself how well it can work :)
There is also more to it than just Nepomuk of course, so you may well bump into a few other things you enjoy along the way ;)