How do I submit feedback and suggestions to the Keynote team?

Hello Frederic,

Thank you for using Apple Support Communities.

You can provide your feedback and requests to the Keynote team here: http://www.apple.com/feedback/keynote.html

Not that as it says at that link, Apple does not respond to the comments made there.

Best regards.

Your Keynote application menu has a Provide Keynote Feedback menu item that links directly to the Apple keynote feedback form.