Check with @gtg, he can assist you in getting your logging correct. It's not really "custom jussi structure", just a configuration of the log settings. IMO, it shouldn't be difficult, with a little assistance, and I think it should work fine for a usage metric.

I don't think the issue is OVH (other than that one time, when there was an actual fire), but we have seen cases where cloudflare has blocked some locations (while most locations are simultaneously able to access it without a problem). I suspect it's related to their DDOS attack prevention system. There are occasional attacks launched against our jussi node.

I have my doubts about all the remote benchmarking tools I've seen. They mostly seem to report different results depending on where you run them from. That's why I think local data at the node is best, if you're trying to measure performance of the node itself, and not external network issues.