I'm guessing most people, if you've played a deck multiple times have cards you just fon't play, or don't play that often. In our play group, the guy who invariably plays tactics never uses thicket of spheres, and I don't think I've ever seen Dark knowledge put into action, I'm sure you each have you own examples.
The question is, what do you do with these cards? on the one hand, useless cards are useful (!?!) for discarding - Eowyn's effect is the most obvious example, but I'm sure there are others i've momentarily forgotten.
On the other hand, more cards bulk out the deck. Is it better, to thin out the dead cards, increase the chance of drawing stuff you want, but then face the situation where you want to discard cards to boost Eowyn's willpower, and everyone's saying "i don't really want to discard, all these cards are really useful."
so what do people think? does a good deck need bad cards to work?