FWIW, I'm also light and had zero problems of any kind with Hetres, on rough bitumen, on hard dirt, in the rain, loaded, etc; the frame they were on is another story. They felt more secure than the GLs in all conditions, but a little heavier. I'll probably use something like an LLP EL or Paris-Moto 38mm for PBP 2019 unless something better comes along in the meantime.
Whilst the Somas weren't really dangerous they frequently behaved disconcertingly, or surprisingly, which was annoying. Given that everyone likes the Compass tyres and I've seen no negative handling comments, that's the way I'd go if I were you. However, I'm in Oz and Panaracers are much cheaper ex-Germany than Compass are ex-USA, for example:
Later,
Stephen