BIIB may list a good pipeline but they fail to execute on that pipeline. If you have followed along for years you would see that there is very little progression of projects once they leave the early research level into pre clinical development and beyond. I know these things take years but BIIB can't follow through. The company is failing in this respect.
Something or many things must be to blame. Either
1--they don't have the necessary number of people to make it happen
2--they advance worthless programs to make the VP's look good