I would remove any references to "delaying" Judgement Day - I'd rather pretend there was no discrepancy with dates, and that history was set - the events of T1-3 simply being to lead up to what's already happened (and we're told the humans have just about beaten the machines in T1, the time travel being a last ploy by Skynet to change history). For this reason I would also have to remove the killing of John's "lieutenants" (the kids at the party) since that's changing history.
I never quite understood why people had a problem with this, changing the past is integral to the plot of T2, the machines were only created because time was changed, and then it was changed back at the end of the film, it's a big paradox and it is different to most films dealing with time travel (i.e. Twelve monkeys where everything is preset), in these films time is fluid (like back to the future things can be changed)
"No fate but what we make." the future is not determined, that's the whole point of the second and third film.
That said, T3 was dissapointing and I wish fanboy every luck improving it, it had some good ideas but it didn't really work, also keep in mind that some scenes are best left deleted, try it out and see how it works but don't put it in just because you can. (I haven't seen it so I don't really know)