I've got an aTV4k and an aTV-HD, no crashing on either one.
both work great. ( I don't game, )
the one thing I would change is the one thing you say "works great so no need to change that"
The remote
The whole bluetooth, HDMI-CEC control of other devices, auto-learning IR commands based on TV model, or using the IR receiver in the aTV to learn commands and send them to the remote is brilliant.
But the layout is very poor. It sacrifices a lot of usability, to look pretty
a couple times a week I hit the wrong button, because I've got the thing upside down, Or It will take me a couple seconds of repeatedly shooting past the item I want to actually land and stop on it (not all the time, it just sometimes seems to get super sensitive)
It truly seems like they only tested it while sitting at their desks and placing the remote nicely beside and parallel to their keyboard in a little marked out rectangle designated for it, and never in real world setting, sprawled out on the couch,
This was really obvious in the very first release software, since if you touched the trackpad at all, it would scroll. Accidentally brush the remote with your hand, BAM you're 5 minutes ahead in your video. They've fixed that fairly quickly with only being able to scroll while it's paused, bit you would think they would have caught that in testing before it was released.
it's not a big change that it needs, either some sort of "guidance" on the back like pretty much all remotes have. Either a rough stripe, a small indentation, or small raised ridge. Something you can feel in the dark. Even giving the apple logo some texture, and moving it up under the touch portion would probably work.
another fairly easy option would be to make it slightly unbalanced, so it's heavier in the back, meaning it would just not "sit right" in your hand if you have it backwards.