Establish a creative pipeline, don't chase ideas

You want to speed up Idea - Feedback - Idea as fast as possible. Here's an idea, what do you think? To do this asynchronously, you need a system of completing work, leaving it in an in-tray for someone else to feed back on, them to get the notification immediately and to be able to respond immediately.

Break up the work into pieces and send pieces for review

As a designer, break your ideas up into small pieces and get feedback on each piece. Don't wait

Share pieces with context

Your work in progress doesn't exist in a vaccuum and it's rarely self-explanatory. The reader or viewer is always coming up with something new.