They need some time to get the stadium in shape, and let's not forget, this isn't a 2 or 3 year thing, it'll be their home for decades, and who knows how long the running track will remain?
If I recall correctly, we dug deeper into the ground to add more seats after the Commonwealth Games, and perhaps West Ham might be able to do something similar.
They new the stadium wasn't perfect when they took it over, but neither was the Boleyn Ground. They'll manage to make it their home in time, like we have with our stadium.
Of course we can have a bit of a laugh and joke about the shallow slope of the lower seating and the distance from the pitch, but still, they're getting a hell of a bargain. Overall I think it moves West Ham forward.