I've ridden M7 track a few times at night and think having own lights helps show up the "bumps", some of them significant on a road bike with 120+ psi. But it is well lit and you could get by without any extra.
Yes some of the transitions in concrete between bridges and the pavement are a bit poor despite the bitumen they have added on top. If you hit them the wrong way at high speed without paying adequate attention I can foresee coming off the bike.