This idea will never happen because the whole point of Oracle (as I see it) is to reward active players. If you look things from an individual gamers perspective, then yes, more cards would be nice. But if you look at it from a game development perspective, it makes absolutely zero sense.
100% on SG's side. What's the point of even going on the game if you have a holiday mode. Everyone knows that the FG, pet, money and even extra card here and there are negligible compared to the nymphs that are given by the Oracle.
People regret having received a nymph and then not clicking "Get card" more than exiting card spins when they were going to win an upgraded card.
If you're going to log in just for the Oracle, do so but a "Holiday Mode" just seems out of the realm of possibility.
How would it help Zanzarino, a game producer that WANTS you to play, not to simply come back for rares?