I think it's a cool way to propose, I'd do it.
Sorry friend I wholeheartedly disagree. The only way a man can propose to a woman (call me conservative) is one-on-one (no audience) invitation to share your life forever with the person you love. I've spent three decades in F&B and if you want some third-party examples of the biggest losers in society FR mail me. Asking someone to spend the rest of your with you is private if you respect the person you are asking.
It's not about you, (audience) it's about her, (commitment).
A diamond ring attached to the hand of a teddy bear works well, also...