The only and real cons I can think of, with longer draws (ear/past ear vs corner of mouth), is that it takes longer to draw and is more movement that could spook game.. and it may be harder to be accurate than with a shorter draw (debatable)
pros: more energy to break through an animal/potentially faster arrow... accuracy?(depending on archer I imagine) easier to hold full draw?
Weight has been discussed already, tl;dr it seems like more than 55#@28" doesn't make sense for most people?