Looking at the M preview release, I see that Settings > Apps has expanded the "Open by default" section for each app. Now there's a toggle, "Open supported lin

Looking at the M preview release, I see that Settings > Apps has expanded the "Open by default" section for each app. Now there's a toggle, "Open supported links without asking", with a list of domain names that the app supports. So you can keep the old "which app do you want to use to handle this intent" behaviour by turning off supported links for apps you don't like (e.g. Twitter).