Some design decisions aren’t great. For instance, given a service key (effectively the identifier for the service to page), there is no way to tell if it’s for use in the v1 or v2 API. No identifiers in the key that you can check offline, and nothing in the API that you can check it against. They are just uuid’s with the hyphens removes, which is a sort of bizarre formate. So if you have a service that generates pages with user provided service keys (i.e. any custom integration), you either need users to also specify which API version it’s for, which is prone to errors, or blindly try one API version and then if it fails try the other, which increases complexity.
Not a deal breaker by any means, but indicates to me a relatively inexperienced team designing the APIs.