Finer control over notifications

I love getting calendar reminders on my watch (~3 a day), but they are grouped in with email (~40 a day). I don't want the email to notify on the watch, way too many and lower time importance than calendar reminders. The only choices are all or just phone/text. Why not provide a custom option and give me a list of apps, and let me choose which ones notify the watch? Seems straightforward to implement and very helpful.