Got 4 new cards in my daily quest on Gold 2. All of these cards are amazing at Gold and I am using the new reward cards in almost every battle! I bought enough cards in the market place to max out many of the reward cards and it is really making a difference in my battles.
At these prices if you want to play the game long term I think it makes sense to at least max out for your summoner levels and then accumulate these cards from the daily and season rewards. I know I am not selling even if I don't have a use at my level for these right now. I will put extras on the rental market and just HODL :)