Hello Nils
I was very enthusiastic when I read your post.
Unfortunately, I run NSX-T 3.1.2 and I cannot see any load-balancer related syslog messages . Neither any switching pool member states nor access log when this latter option is enabled.
Of course, I can see all other kind of syslog messages issued by the edge device.
Until now, the few syslog messages about LB service I can collect are send by NSX-T Manager.
Regards,