All of those things are concerns. But if video game publishers really needed to figure this stuff out in order to sell units, they would. Contracts would change. But they'd still get signed. Everyone wants money too much. The only hard part is trying to fix this stuff for games which have already signed on the dotted line. Or games which have shipped and disbanded their software teams.
But even then, can't they just opensource what they're allowed to? Even if it doesn't build, it wouldn't take the community long to rip out FMOD or whatever and replace it with working alternatives. Or submit a final patch which removed the part where games phone home before launching in singleplayer mode. Why would that interfere with the licence for 3rd party IP?
IMO if I'm "buying" the game, you can't also remotely disable the thing I bought. (And "buy" is the word they all use!). If you want to remotely disable the game at some point in the future, I'm fine with that so long as they list it very explicitly and loudly on the box. "THIS GAME ONLY PLAYABLE UNTIL 2030". Games publishers need to start being honest and upfront about what we're paying for. Its not an unreasonable ask.