Yep, I agree that Bitcoin transaction fees are going down and as you posted it is not from few days and it is low for past 6 months. The traffic behind the blocks approval may be less or due to competition the transaction fees may be less. Anyway the fees low has made us spend little amount in transaction fees while we trade.
So we all must be very happy. We still feel benefits from low transaction fees. I believe that in the future it will be near zero, but never be for free.