So ... now, when we know what are we not complaining about ...
What we ARE complaining about?

The bird knows. She needs to know. You do not.
Sooo, my takeaway is that Vicious Mockery should be Casual Discourse? The whole idea is that it's supposed to be offensive, congratulations, you've failed your saving throw.
haha
I don't see the problem. Have you ever ACTUALLY played DnD and seen what players will come up with for vicious mockery insults?
I'm not saying I want it to go away. I'm just saying it's not for me.