Why are you removing Photo Streams?!
I've been uploading photos regularly to multiple streams to be used in Photo Streams and today when I went to upload I found Photo Streams will be replaced by Backdrops. I then found a link that confirmed it. I'd be fine with it, but it only allows you to stream one album rather than a mix of all of them. I have 204 in one and 5 in another and maybe 10 in another, etc...
Now I can select one album and that's it?! That shouldn't be forced upon your users. I know many people that use their family photos as their screensaver and the other app supports 1000 pictures per stream. Backdrops supports 100 (or 200, can't remember) photos in total. Even if you select multiple photos as "favorites" it will error if there are too many.
I never had this issue with Photo Streams. Why are you removing such a useful channel?
For those unaware here is ROKU's official link announcing Backdrops is replacing Photo Streams:
https://support.roku.com/article/36075194719383