Here are the main ideas ideas
Here are the critiques
Take the ideas proposed ideas, revise them based on the critiques.
Brainstorm some more, revise and submit a new research proposall.
Optional: if you're feeling inspired, include some additional mockups that illustrate what you're thinking of.
They do not need to be a follow-on to the last time's ideas. (You can propose a different research proposal, or riff off previous proposals/ideas).