Definitely. Mailbox's only distinguishing feature is task-based email. By making it GMail only, there's not really much to set it apart from the official task-

Definitely. Mailbox's only distinguishing feature is task-based email. By making it GMail only, there's not really much to set it apart from the official task-based Gmail client (Inbox). Inbox works really well, so I'm not sure what the purpose of Mailbox is at this point. General IMAP support would be a huge plus.