Well, it doesnt all look the same, does it? There are varying styles floating about. Itd be like saying, well, all these people are working on zelda, why not work together? Youd be left with a mix of styles, half cel, half hirez.
I do agree however. Too many people working on it...not trying to sound elitist but yeah...and also it seems to breed the largest amount of people who cant read instructions, in the world, ever.