I would suggest "Report a problem" instead of "Comment on the experience." While Apple is known for caring about user's experience, "Problem" is likely a higher-priority topic for attention.
I'm thinking of starting a new, fresh thread for this with the support link in the first posting, so that everyone who sees it will see that advice. Then if everyone who's posted here posts a +1 there, maybe we can get that one to take over in search engine hits over time.
Here's what I'm proposing to do, I'll wait a day or two for comments before kicking it off:
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Subject: Apple TV screensaver bug: Switches repeatedly away from my photos back to Aerial
Text:
This bug has been irritating me and many others for a long time, but no fix from Apple because it hasn't risen to their attention. If you are having this happen, it's important to REPORT IT TO APPLE, they do NOT read these forums looking for problems to fix! Report it at:
https://www.apple.com/feedback/appletv.html
For "Feedback type" in your report, use "Report a Problem"
Describe how much it bothers you any way you wish. If you title it "AppleTV Aerial screensaver bug making me angry" it might help Apple see that a lot of users are unified (and angry) over this.
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Feedback/comments welcome, let's get organized on this!