Thanks for your work and the mockup of the UI changes. It illustrates very good what you want.

But there is already a Brainstorm for this issue. Here is the TALK

It belongs not only to the problem with calls, but also to events like alarms and alearts (at example from the calendar).

In my opinion we have not only a problem with calls, we have a problem with all events that unlock the device itself!

Would you add your Idea's there or shoult we keep up several Brainstorms for each Application?
Could a Moderator merge this?

I would love a Device wide solution more than a totally different handling on application level.