do you plan to report on usage stats?
Such as bandwidth or average/total connections/ddos attempts, etc? If yes, its built-in in both AWS and Vultr and for Sweden and Slovenia there can be done local traffic monitor. As example, one time it was posted re discussion of Public API abuse on the github (i believe england.bitshares.apasia.tech was on the screenshot).
For the uptime stats, latency and availability will be used status pages as mentioned in worker. One for all listed Public API's and one separate for just nodes listed in this worker.
When you already mentioned, maybe it would be good to make an offer:
In case that this worker gets approved/voted it would be nice as respect and support of BBF infrastructure worker, that we can wrap our nodes under their balancers, and add their balancers/nodes to separate status page (their proposal is having milestone for development, we have it using uptimerobot), to get more data from monitoring to be compared, improve bug tracking, add more transparency to the stake-holders, etc.
Personally, I do believe that such co-operation would be of great benefit for everyone.