Well of my last 5 packs I've had 2 cards I needed (as in, i didn't already have 2 of them) sorta plateau. I have most decent rares, a higher end selection of epics/legendaries and can make a selection of mid/early decks but am missing the extreme late game deck legendaries... but that's not quite so easy to fix as we all know

I dont mind paying for the game but tbh I've played so much now that I know an investment of say, 40 packs is really going to only give me a LOT of dust, a few rares/epics/maybe a legendary. It feels like early investment in the game is the place to do it if you plan to buy packs but as I'm already there, i'll sit on my money for a bit
I am resisting dusting the crap (hello farsight) on the off chance it ever becomes niche / I can dust it for full value due to a change on the card.