This is not a high bar: Outlook on Windows is a mess from a user interface perspective, and has dialogues buried within that have not changed for decades. First, it will be the best Outlook yet, perhaps on any platform, in terms of appearance and design.
Microsoft has not specified a release date for the new Outlook Mac but a few things are clear.
The current preview is not fully usable, but fortunately switching back is quick The problem of Outlook on Windows being different from Outlook on Mac will get worse