In the new look, it is great that all but the last few messages are collapsed. But when having long e-mail conversations, and the entire message is continuously replied to with including the original message(s), each mail message becomes longer and longer. GMail has a nice feature that will collapse the repeated part from earlier messages in the conversation (as hidden by the in-message button with the dots). This makes it easy to get to the right (and new) information in that message.
Next to that, being able to collapse an entire message manually in the conversation list would also be nice, so we can only focus on a few messages, in stead of the entire one. this is useful when there are some internal comments in the system, but you only want to see the last two messages by the customer
