User blog comment:Kplate/Deck building and side decks/@comment-1755882-20141006025152/@comment-25389903-20141006040546

I'm not so sure that I agree on your first point. Assuming I used this calculator  right, the difference between a 50 card deck and a 60 card deck in terms of drawing one or more copies of a card you have four total copies of in your opening hand comes out to five percent. I'm no professional statistician nor a great deckbuilder, but that tradeoff seems small enough that it's worth testing.