Wow! That is a cake which commands respect. And I see what they meant about the chocolate curls, now - I thought they would be just random little curls all over the surface, but this is much more architectural.
I do detect a slight leaning-tower-of-Pisa effect in the third tier, but this does not detract from the overall impact, and may well be fixable anyway.
And the good news for you is that there isn't much room left for chocolate button cats to be depicted!
You're right about the Pisa effect. It's very noticeable from certain angles. We hope the florist will be able to disguise it when she drapes the cake with flowers.
And, no, the chocolate-button cat idea was abandoned- yay!