I don't think that's really true. We had two different styles of play last year (before and after Rondo's injury) and PP and KG were playing during both of them.
This is mostly true, with one really important caveat:
With Pierce and Garnett on the floor, this team has very consistently ground to a halt late in games.
Even when the entire rest of the game goes well playing a different style, you see them slow it way down and fall back on Pierce isos or Rondo and Garnett playing hot potato in the corner until Garnett gets an open jumper or Rondo takes an end of the clock three. As long as Pierce and Garnett are around, I think Doc and the rest of the players are going to look to them in those essential moments of games and we're going to fall back into old habits that once were tried and true but are now really flawed because this team isn't built to win that way anymore.
Ultimately, I see that we're gonna become the next Atlanta Hawks or Milwaukee Bucks of the East with that lineup.
Unless you bring in a Center that's similar to a Dwight Howard-caliber player minus the ego and preinjury.
See the post I made in response to another person who said basically the same thing.
The idea isn't to go forward with that as a core that is going to win the Eastern Conference. Of course that would be foolhardy.
The idea is to see what we have, and have some basis to show other teams, "This is the value of these players" so it's not all "Well, they COULD be really nice players if they got the chance." That puts us in a much better position to make moves.