Several new ideas and the new version is BAD.
First, I agree with many of the other suggestions that the previous version of Yahoo Mail which you call “Classic” was much better on the eyes and functions.
New Item: the column with “COMPOSE” at the top should be adjustable in width because there isn’t enough room to show the names of the Folders
New Item: When sending emails out to a personal distribution list, you should have a “Select All” button.
Final Item: I could not find any way to refresh the “IN” box in order to see if any new emails had arrived. Under “Inbox” you have 2 choices,” Mark emails as read” and “Clean your Inbox”. Add one more option “Refresh Inbox”.