With the release of iOS 11.2.1 an essential feature of my Apple TV was removed I have an 3rd generation Apple TV which I use as a home hub. After remote access was disabled from Apple because of CVE-2017-13903 and turned on again with iOS 11.2.1 it stopped working remotely for shared users with the Apple TV.

Here are the changes to HT207057:

This is the version of  Dec 15, 2017.

And here the version of Mar 27, 2017 as it looked on Sep 27, 2017:


I am a bit unhappy about this because I don't really use the Apple TV for watching, so it would be a bit overkill to buy a 4K one. What could I do?
You can buy an Apple TV 4 (not 4K), which is cheaper. Or if you have an iPad model that can be updated to iOS 11 (which is Air/Air 2, 5th gen or newer, or mini 2 or newer) use that as your home hub.

Otherwise you are out of luck. Even if 3rd generation Apple TV had a jailbreak available (it does not) to patch this feature back in, you're talking about encrypted communication between Apple devices and Apple's servers, which is extremely unlikely to be able to be replicated by a third party to reenable it.