Yes I loved Blue Merle too, but that blue version. I remember sending a big sample from one of my bottles of Blue Merle (I have three) and the recipient didn't even even recognize it as Blue Merle. None of them are the same, and none of them are the lovely blue-grey they were originally, they're now just grey.
My bottle of Walt Whitman was never green. It was kind of this dirty brownish-green. Now I don't find any green in it at all. I think I only imagine the green because I want to believe it's there.
I loved OS inks. I was such a supporter. I really enjoyed those soft but powerful colors. But to my mind they aren't all shelf-stable. They change sitting in the bottle in their original box, inside another box, in a temperate climate. Not acceptable to me. I have an opened bottle of vintage Sheaffer Skrip I got in an estate sale, perfectly good ink, the same as it ever was, enough phenol to kill a moose. This ink will evaporate before it goes bad or the ink degrades.
And some of the inks seem fine and to have held up, but I have doubts about their long-term stability. So I worry.
I'm sorry if I'm violating the rules by expressing my opinions of an ink brand. I wish I had only positive things to say. But I don't. My experience has been very mixed. I can only hope that the new incarnation of OS inks is wonderful. But I'm not going to spend my money to find out.