Why would you fail him on the 3/0 for 200 amp service? This is a dwelling? table 310-15(b)6 seems to allow 2/0 Cu for a 200 amp service. I see the pipe issues, and how he brought it into the panel is horrible, but the size is ok. Is pic 1 nad 2 the same service, seems like copper at the panel and AL at the meter socket.
