She's the ultimate anti rush unit. Her skill lasts 30 seconds at max with like a 22-21 second cooldown and doubles all her stats. Reaching over 500-1000+ attack, 1800-3600(If they don't add affection bonus automatically to her AW stats) hp, 280-560 defense, 2 block and attacks all units she's blocking. On top of that she dodges... Having a skill like that be active more often than it's on cooldown is pretty absurd and makes up for the lack of instant use blacks get I think.
At first glance she does seem underwhelming, until you add all of that together and realize that she's OP as fuck (after AW). Beforehand she is a bit weak, mostly just on her HP/Defense. Her AW ability perfectly makes up for that though. If she was any stronger/cost any more, she'd make most other units pointless, so I can see why she's a lower cost unit.
I think most these new sapphire girls will be similar, incredibly powerful at one thing but not as widely usable as blacks just so people will still have a reason to acquire them. Black units are a gamble, these sapphires are probably mostly going to be "Pay to win". You spend a lot more finding black units after all on average in gacha than you'd spend buying these magazines. So I wouldn't think of them like an improvement over black units, just like an alternative option. They're closer to advanced event units than advanced premium gacha units. I appreciate the certainty/guarantee of them for those who don't like to gamble (Me). Maybe a little specialized, but still crazy powerful.
It'll be cool to see what other unit hybrids they make. I think most sapphires will be like that.
