Shadowverse

It was obvious that without nerfing neutral decks, they would still be top-tier, so they decided to cripple them to make everyone rush to buy new packs...

Even without the greed factor, this was the right decision (I think most players had enough of the neutral decks in the last three months). And considering the full refund for the nerfed cards, this isn't the best thing the company could do to motivate players to buy more new packs.