Rokkon and Stonedar are vintage MotU male characters (that's three "pluses"), whereas Granita is an unreleased PoP cartoon female character (that's four big "minuses" according to the most prevailing biases). If released on her own, she would be an "easy pass" for all the vintage-only MotU-only males-only crowd (and, on top of that, they would loudly complain about the "waste" of a slot). The only real opportunity to see her released was in a pack together with the "main" Comet Warriors. But that possibility has now vanished for her (not to mention for Facet or Quartzina).
The execution of the revealed Rokkon and Stonedar certainly seems unexpectedly good (I wasn't expecting in the least that they would be able to fold into rocks like the vintage figures did, given Mattel's current corner-cutting practices and, especially, what they did, or rather didn't do, with Jewelstar). I'm glad about that and that at least we'll be getting those two.
But I can't hide I was profoundly disappointed the moment I saw the reveal, because a Rokkon+Stonedar 2-pack clearly means no other Comet Warrior will be released in MotUC. The only way for Granita, Facet and/or Quartzina to see the light of day was as companions to either Rokkon, Stonedar or both (say, a 3-pack of Rokkon+Stonedar+Granita, or two 2-packs of Rokkon+Quartzina and Stonedar+Granita, or one epic, super-special 5-pack of Rokkon+Stonedar+Granita+Facet+Quartzina).
There's zero (or at the most infinitesimal) chance the females will ever make it on their own. Even the Meteorbs stand a better chance of being released now (since they're vintage MotU, after all) than any of the Comet females (and the gloomy prospect is especially dire for Facet, given that her being an adolescent, rather than an adult, adds as fifth "minus" to the long list of no-noes, even though a newly-tooled teenage-sized female buck could in theory be reused for 200X Teela and NA Drissi).