In the older client I could specify from the drop down list which email account to choose when downloading messages. In the new betas and simplified menus, you have to highlight the email account, then choose the "get messages" button up top next to "new messages".
I propose to add to the right click menu (right click on account) the option to "get messages".
I realize the announcement said that betas at this stage do not have all the features in place, so this request may all ready be part of the plan. However, if it is not, I'd ask it be considered for user convenience.
Thanks