As often seems to be the case in a restricted list discussion, people start talking past each other and defining things ever so differently as to make their argument. I'll try to clarify since it seems what I'm saying is being lost.
My "justified reasoning for restricting dredge cards" was a separate point to yours, Brian. I am a numbers guy, and if the numbers aren't absurd for something I don't see the justification to restrict something. If you want to explain why the numbers are wrong that is another argument that I would listen to. Soly seemed to be responding to my comments in terms of the numbers, and I don't think that what he presented refutes anything that I was saying and certainly doesn't make my initially factual statements about the numbers false.
As to the elusive, mythical "6 sideboard slots", I specifically mentioned "exclusive" Dredge hate because that is what these cards would have to be for them to be "opened up" by Dredge being restricted. This does not cards include cards like Oath, Sorceress' spyglass, Wasteland, ect. that I'm fairly sure are being played for other matchups rather than just Dredge. I mean I'm almost 100% certain that restricting Dredge won't suddenly make you stop playing Oath of Druids in an Oath of Druids deck.
You playing 1 Dredge hate card in your main deck, and winning is great news! I have to admit that I was unaware of these results as I've been playing Dredge and I have not seen a blue player play a game 1 hate piece on me. It also means Dredge isn't that hard to combat. I'm not sure how this is any different from the anti-Workshops strategy 10 years ago of playing 1 main deck Hurkyl's to sure up a match up.
Is Survival even a GY strategy?
Perhaps not, but I tried to be clear in stating that I felt it was a GY strategy in my point.