Everything is enormous with tons of wasted space around panes. The right side pane where calendar/contacts show cannot be collapsed taking up even more space in the page. I have half the real estate availabe on the old version for reading my emails. So much so, I had to change the zoom of the page to 80% to get some semblance of normalcy. Oh that means I need to keep on my reading glasses at all times now. Thanks Yahoo!

When reading an email, the part of the pane that shows subject/buttons/from-to take up over 1/3 of the email pane (I have it set to open at the bottom).

No seriously, this is designed by someone who has never used email before in their life and doesn't understand the concept of screen real eastate. You can add all the nice little features and buttons but in the end if doing the simple task of READING MY EMAIL is made harder, it ain't worth it.

The hilarious part is that you want people to pay money for this abomination. Fix this ****.