Personally, I don't think the "tint lottery" is an issue, at least not any more. There will always be some issues with lights, and given the popularity of Zebralights on this forum, there's bound to be some people that get a greenish tint or are sensitive to tint issues. Those are the people you hear about. Far less people will get a light they're satisfied with and post that they're happy about it. It's just the way the Internet works.
For me, I've been pretty happy with all my Zebralight tints, going back about 5 years. The only one that is slightly greenish, is a first edition SC52 cool white, but I only bought it because neutrals weren't out yet. But it's no worse than any of my other XML cool whites from back in those days.
If you're expecting perfect, you'll have to stick to the HI versions of Cree LEDs. The regular domed Cree emitters will always have some tint shift, and some green in the corona, regardless of the brand of light. Zebralight doesn't do Nichia 219 emitters.
I'm sure if I bought 100 Zebralights, at least 1 of them would be an ugly green I wasn't happy with.