Well. I’ve done the dialogue. Can’t entirely recall what it used to be, but I think what news I do have is bad news. There’s a point where you can ask “Do you know how to fix this malfunctioning engine” to the Steel Watcher, and you get the response
“Your make is very obsolete. Repairing your engine would not only be impractical, but impossible. Report to the Steel Watch Foundary for immediate dismantling.”
Yes this dialogue was already in the game. We spoke about it few times in the past here. I think it doesn't really matter what steel watcher says, because we already know, she has old and overheating engine, but we need to fix it somehow. Far worse it will be, it something like this say gondians.
About the patch. I like the polishing of Karlach, it is nice to see how Larian still updates the game not only by bugfixes.
If the possibility of fix her engine will make it (back) to the game, I'm expecting it at least six months from now in some huge patch and it will be probably only some smaller quest or story line or how we can call it, or a year or more in case of Avernus or Upper city story in Definitive Edition, because this will take much more time to implement.