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I changed Sealed Good in a Can to Sealed Unknown Quantity in a can only because it's not clear yet if Lapis Lazuli is good. She's a Gem, but she accuses the Gems we know of something horrible — which could be her having an understandable emotionial reaction. Or our Gems could be having Steven (and us viewers) on, which, admittedly, is less likely.
But we don't know for sure if there's a Good or an Evil, two flavors of Good, or if something closer to "there are three sides to every story: their side, the other side's side, and the truth" is what's really going on and we won't until future episodes reveal more.
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