William--
your 'cuz has some problems headed his way if he doesn't get some things changed. I can't tell what's going on with the roof framing in those shots, but the I-joist attachment details are decidedly wrong. You can't merely toenail the top and bottom chords, nor can you nail blocks beside the webs as some sort of support. The manufacturer of the joists supplies hardware that must be used in those applications. They also have very specific requirements for web stiffeners and squash blocks in certain situations. Those things must be done or failures down the line are likely. If there is not a competent municipal code inspector locally to straighten things out, he needs to hire a private inspector well versed in new construction phase inspections.