There isn’t a trade to be made but anyway...

If you made a poll “do you want hard mode scroll at quest bosses” I’d support that.

I would even support earning an extra achievement to that effect, but no extra rewards, not even titles. The end of each main quest line gives an achievement, so let there be another for activating all the HM scrolls throughout the story.

Let it be an extra icon next to achievements like https://en.uesp.net/wiki/Online:Kingmaker