I won't address your second point since I'm not really talking about anyone else, just Lidstrom.
When you consider that the guy's peak of dominance was basically fifteen years, all his records, his status as one of the greatest and most accomplished European players in the history of the game, the fact that he was dominant at both ends of the ice, etc., I just don't know how you could not think he was a generational player. That you didn't consider him in the same class as a Brian Leetch or Chris Chelios until he was 30 doesn't really do it for me, since he continued to be dominant until he was 41. He won all those Norris trophies and the Conn Smythe after 30. I don't think you need to be considered generational the moment you step on the ice to be considered generational when you hang them up.
If you asked 100 people to list their top six or seven defensemen ever, I'd wager 95 of them would have Lidstrom there. He's in my top five, easily. Being one of the five greatest ever to play your position, is, to me, the defenition of generational.
But, everyone is entitled to their opinion.