Pre 5.1, Golden Lotus were relatively rare out in the world - I found the easiest way to collect them was with to buy them three at a time with spirit of harmony or to grow engima seeds for the chance of them to proc.
Since 5.1, I've not found any golden lotus out in the world... instead I've been getting golden lotus from time to time when I herb normal herbs - gotten five already like that today.
Anyone else noticed this rather nice change ? I think it more than makes up for only having two golden lotus from a spirit of harmony now.
Edit: I've now found a golden lotus in the world. And got 2x Golden Lotus when I herbed!