The maesters are a bit out of control right now. 1) I like errataing the agenda to say printed Maester. I've played with the Laughing Storm and his power level is pretty silly, keep him restricted. 2) The Prince's Plan should be left alone until after Days of Fire and Ice, then, possibly banned. The errata would be difficult with wording and restricting it won't hit that many cards.that you want besides Burning on the Sands.
What makes Plans so maddening is that the other houses don't have access to that in-house power level. The only other house that has an expenditure of more then 3 influence is Greyjoy with the Drowned Prophet. And that ability is wicked good, however, it can only be triggered three times per game provided you pull all three of them. We need to see some "big" in house out put to match what Martel has. Or introduce more discard pile hate, doesn't have to be good, just available.
Counterpoints: 1) If this happens, martell gets another weapon in it's arsenal. Other houses can run it, however, Martel has the best, if not most numerous maesters. 2) This won't be necessary if we get accessible location control for everybody. Notice I said accessible, not neutral auto-include 2 cost solution.