Yeah, I agree with the gist of your post. I think there should be time limits to determine the correct call. If they still can’t tell, the goal should count. I also think that it should be an automatic review. The added element of a “coach’s challenge” for goal scoring plays is unnecessary IMO. Should be centralized in Toronto, as you said.
Only thing we (maybe) disagree on is that I don’t think the review should go away. It’s 2025. There’s too much quick, cheap and easy access to tech out there for leagues (especially the highest ones in whatever sports) to excuse away missed calls. Yes, there is still necessary human subjectivity in many areas. But offside shouldn’t be one.
At least from my angle, this almost never happens anymore. Because the play can be reviewed, refs are always leaning on letting potential offside plays play out.