Personally I think there had been improvement game on game with the defence. Yes we lost to Scotland, but not because they manage to effectively breach our defence, but because we gave them the ball 22 times! When they had control of the ball they couldn't do anything with it. Compare that to the first game where the Italians were carving holes for fun for much of the game.
The attack is bloody dire though, and sadly I can't see that changing under SB. He's just not the man to lead the kind of talent we have on the pitch. He's clearly shackles them, and knocks their confidence to play instinctively.
But I do understand that with all England resources, depth, etc. we should be looking a lot more settled by now. Personally I'm willing to give SB until the end of the AIs to pull it all together. If it isn't working come then; he needs to be replaced.