They didn't need MacT or Anderson. I'd argue Matteau/Noonan were pretty important players.
Yeah, it's impossible to be confident either way of course.
We have to look at those trades in context of the league that year. Two teams were the class of the league; the Rangers and the Devils. The points difference in the regular season, I believe, was simply that the Rangers won all head to heads with the Devils. But they were tough, physical, even games.
The feeling in the room at the time was that, for the Rangers, the cup went through the Devils. They knew they would have to beat them, and they knew that series would be total war both physically and mentally. So Keenan was absolutely adamant that they needed battled hardened, grizzled veterans and tough guys who could deal with what was to come.
I mean, who knows. Maybe if they keep Amonte and Gartner they skate rings around the Devils and just outscore them. But, whatever you think of the trades, you have to say their idea of what that series was going to be like certainly came true. The Gartner for Anderson trade obviously looks brutal and the McT trade not much better. I don't think it's crazy to suggest those guys were important dressing room guys considering everything the Rangers have to go through to finally break the curse. Although the counter argument to that is that they already had a really strong leadership group.
We'll never know if they win without the trades or not, but they certainly left them in a worse position in the long run. Whatever you think, it was worth it though.