Was the game designed to be boring until act III ?

I remember playing DD and being completely immersed by the plot from the start , Now it's taken me over a year (i completely uninstalled it 3-4 times out of lack of interest) to get to Act IV of BB basically because i couldn't get into it due to it's lack of plot , Now i am there however it is very interesting and it seems to have made the previous 3 acts worthwhile .

So i'm not really complaining just wondering what happened to the creative genius's that made DD?