Isn't this sentence a bit further down more clear? > This is a system design that we began implementing four years ago. While most of our critical control plan

Isn't this sentence a bit further down more clear? > This is a system design that we began implementing four years ago. While most of our critical control plane systems had been migrated to the high availability cluster, some services, especially for some newer products, had not yet been added to the high availability cluster. and > It [PDX-04] is also the default location for services that have not yet been onboarded onto our high availability cluster.