I thought they ended up doing this, or at least lowering the scores enough that multiplayer didn't matter, when they released the Extended Cut.
Even then, I believe that if you carried over from the start you could still get enough score for the best endings even before that. I know I was able to get the best endings and I didn't play the multiplayer. Since this would be a bundle with all the games maybe that would negate the MP being absent?
I'm still pretty sure it was rescored after Extended Cut though.