Ask HN: What is missing in the email experience?

I feel like email is used at great extent in professional environments, yet I honestly think there is something missing. The experience is mostly clumsy, hard to read, threads are not great, etc.

Though I am not fully sure how to fix that. I am taking a stab at it (dobror.com but promote it is not the purpose of this post). I really would love to know:

1. What do you miss in your email client? 2. Is there even a fix for that?

Thanks!