I'm not too keen on that idea, bananabean - it unravels more than it stitches together (for me, at least) so I'll stick with the minus 5 option I've had since day one... if I must.
As I see it, the silver zone is the 2nd area that shows some kind of completion (the 1st is the removal of the protagonists - leaving real words behind, which is fine).
The subtitle written under the grid doesn't prove anything, because it's explicitly requested in the 'Instructions' and easily found as soon as the source is identified - writing it under the grid doesn't show that we've cryptically interpreted it (so removing some of what demonstrates this must be wrong, I think).
Now - and this is where I get stuck on trying to resolve this puzzle - as it stands, the silver zone doesn't really demonstrate that we've understood its cryptic significance. It just falls out that way during the solve - and we're not asked to highlight anything that would prove we've 'got it'. But if the silver zone was realigned, that would prove something... and so I keep trying... but it became a chore some time back and I now think that (even if there is a brilliant new resolution) it's badly flawed as a puzzle and the Ed really needed another ed on the job - but, as cockie has pointed out...