Yes the Drop rate is now 2% which is indeed double of the previous 1% drops of the past.
Of course I jest and in all seriousness I am happy that this is being fixed as I personally saw no point in trying to farm for Atma anymore. (I got 4 pieces and till this day never saw another).
I understand why they tried to have the system the way it was, pace the players how rush to the end of the current content while they have a chance to make more content. This is why I think the current structure of the Relic/Zodiac weapon quest is the way it is and my get overhauled as a whole in the expansion.
