Back to Cattleya and her buffs:

Skill:
Still 34% chance of activation (~41% with her x1.2 skill activation) but now it's 2.9x FIRE damages instead of 2.4x FIRE damages. It's +0.5 FIRE damages. That's good. BUT, not as good as you think. Her skill is stronger yes, but A LOT of girls have stronger skills now. She is better than old Cattleya but in term of skill she is still at the same position compared to the others.
But that's great anyway.

Abilities:
Her worst point in my previous rating. Her 50% Solar Gauge filled is still bad but they fixed that horrible 40% ATK for 3 girls. Now it's 48% for ALL girls. And that's a good thing. She give a better ATK boost and she give it for every girls. No need to rely on RNjesus to see your hero take the boost.
She could be a better damager and a better support now. And just with that, Solar Gauge filling looks like less important flaw. I mean, if she doesn't have it, I'm not sure she would have all these better boosts.

Final verdict:
She is still not a super top tier girl but she is clearly better now. Great as buff support or damages support. Maybe she is not a must have but she is clearly a nice to have now. I give her a B Tier.