I tried to get used to the layout of the message list, but it is not good to me. Having the subject of a message that too many times is displayed on two lines (and sometime is not complete) is very bad. It makes impossible to quickly locate interesting topics, reading is too hard.
Please, consider a different layout where the title is complete and guaranteed to be in a single line. Changing font size to small doesn't solve the issue.
I see a larger font for Replies / New / Latest Post columns (I have the small font settings) and in general the name of the person who wrote the latest post in a thread is less important than the time, and everything is less important than the message title. The consequence is that you have a lot of empty space around the title of the thread and this creates a low density visualization that could be nice at first sight, but is not effective when you scan it.