What i would have liked in Steam was to refuse that Just Trains update of SW Express Reading to Exeter on March 25, 2024. From now on i would want to hear that a 3rd party DLC update was not itself a problem before agreeing to it. My Oculus Quest 2 gives me that "update blocked" option as a Lock. Microsoft windows 10 app store almost gives me the option. Google Android almost. The latter 2 really only offer a delay ... Playstation 5 lets me cancel some updates from the update queue.
That is a core Steam thing. You might post this on the Steam forums, as it's nothing DTG can do anything about. The JT update is great btw.