Ok, so in my opinion I’d rather have Ibaraki than Raikou, and their kits are very similar but still just different enough to not be clones. And I get why others prefer Raikou, I do - that Buster buff Maybe it’s just character loyalty (Long ago grailed and 10/10/10 Berserker, and got to Bond 10 earlier this year as well).
Her NP gain is good enough (esp with crits) to make use of her 3T NP damage buff 2x. The relative ease of firing her NP helps her generate stars to keep the crits constant. I think the weaknesses in her kit (no hard survival and no Buster buff) are fixed by one person - Support Merlin. Sure you can use Raikou and a Support Merlin as well, but I like her having all 3 main damage buffs in that case vs. Raikou still just having 2.
(As far as NP damage goes, NP1 Banana ~35k, NP1 Raikou ~38k; both lose to Kiyo, Li, and Medusa if you have them, and Kagetora in about 9 months will just do far more at NP5)