I edited my original post and added some thoughts and opinions.
As far as working traps.
I don't worry that much about trap training. They sit in such a spot that no matter your program they will be worked at a level appropriate for what your doing. I say that for this reason.
I would rather not have overdeveloped traps, that will throw off the upper body balance. let them develop as your overall level of programming develops.
As you begin to press and deadlift heavier weights you will know when it is time to work them harder. Before that time comes there are more important areas to focus energy into.