I hope so too. The problem is that with corporate BYOD policies, more often than not, the destination app that's on the user's devices isn't limited. The security policies just apply to things like passwords & encryption. If the users do end up downloading & using the Outlook app, they're essentially bypassing all of the BYOD policies since their credentials are stored on MSFT's servers as well.
So hopefully cautious IT departments are picking up on this & locking down apps too!