For a work phone, Windows 10 Mobile is actually a fantastic platform.
Agree and I think thats where MS's strategy is aimed, phones that can be easily integrated, provisioned and locked down via a Enterprise server would be a winner in large corporate. Might be a place for them in SMB's to.
One thing Windows Phone/Mobile - be it 8 or 10 - has always lacked has been a good VOIP app
Sadly, also agree