Allowing the user to choose their default assistant (Google, Cortana, Siri, ) would be a good start. EDIT: I didn't read the question carefully enough. I don't

Allowing the user to choose their default assistant (Google, Cortana, Siri, ) would be a good start. EDIT: I didn't read the question carefully enough. I don't believe Apple has dumbed down the UI to push people to Siri. That being said, giving users a choice over the assistant, browser, etc. would be a good thing.