"New customers get new Rate Limiting by default while existing customers will be able to run both products in parallel: new and previous version."
"Existing customers will be granted the same amount of rules in the new, unmetered, system as the rules theyβre currently using in the previous version (as of September 20, 2022). For example, if you are a Business customer with nine active rules in the previous version, you will get nine rules in the new system as well."
"In the future, the previous version of Rate Limiting will be deprecated, however we will give plenty of time to self-migrate rules."
The fact you're seeing slowness from multiple Cloudflare DCs to me implies it is not a Cloudflare issue, but either the connection between you and Cloudflare, or Cloudflare and your origin