This new version is not nice, I used to see all my associated emails from the outside and can see when I have new unread emails in all of my accounts, now I have to go and choose the one I need to open and see, you blocked the outside general visibility of all emails, and forced me to open it one by one to see if I got new emails, Not good.

At least leave an option for people to remain on the previous interface version if they feel more comfortable using it.

People take time to adjust to changes, so leave the 2 options available until everyone feels comfortable with the new one and stops using the old one based on their own will not by force.