In the old version, you could easily select stared messages, unread ones, etc.
Thus, if you received new messages, it was fast and easy to delete the new spams, etc.
The app was showing the number of unread messages of all the accounts simultaneously, etc.
And during the checking of all the accounts, you could see where the process was (fetching mails for this account, fetching mail for this other one, etc.).
Why have you suppressed all the functionalities that made k9-mail the best app for mails?
Why?? This is not improvement… If I try to go back to the old version, the app crashes, so I am stuck with the new one… Sad.