Thanks for the feedback!
1) The long-term solution for full skinning of a video player is probably to allow you to double-click into the video player and edit the skin, just like you can for other components. However, you are right that that's not supported in the current version.
2) You can trigger a sound effect to play during any timeline by adding a "Sound Effect" action. However, you can't add controls to pause/stop the sound. To do that, you can use a video with no video track (just audio). It's a bit of a kludge, but it works.
3) That's a great idea. We have no immediate plans to do that, but you should submit it to the ideas site: http://ideas.adobe.com/ct/s.bix?c=DA4859AD-8934-4F93-983A-4219E2DD9275
Hey sorry for the late response but I tried posting the Idea just like you suggested but I am taken to what appears to be a blank page at this address when I click on the giant yellow button that says post idea.
he page is done loading, I've tried refreshing, loggin in from different computers first. Am I missing something? haha
We are having some issues with the Ideas site. The team is working on it...you might want to try back in a few weeks. Sorry 'bout that.