Remove height advantage and allow Inspiration to be used in combat, player's choice. Adds to strategy. Is your character dying? Failed Death save twice, failed the 3rd? Nope, use inspiration and try again.

Think about it. When is Inspiration most important? Battle. Not dialogue. In real life, you inspire people before battle to help boost their focus and morale. So when should Inspiration be used most in this game? Combat.

Besides, with background rewards now, we get inspiration more often. So it would make the most sense.