It's like you all think she's totally sane or something lol.

what would she gain from killing Bronn?

Absolutely nothing... I guess we'll see lol. Not a lot of imaginative people on here.

Did she though ? I recall her scoffing at the idea & making a remark about you can't believe anything a dying snake is saying

They certainly left it open for interpretation. I was under the impression she believed it, but i don't think that'll make her hatred for Tyrion fade. Could go any way at this point.

I think she pretty clearly did, because she ended up saying something like "I told you we should have killed her my way".

No, I think the scene showing her accepting it wasn't bad writing/useless.

It's just one factor of many lol. Even if she told accepts he had nothing to do with their sons murder. He still killed her dad, and is allowed with the bitch who's coming to kill her. Just doesn't seem like a big jump. Totally fine to disagree ofc, but just throwing it out there as a possibility that I'm feeling pretty good about.