update readme wording

README.rst

@@ -24,12 +24,14 @@ Analytics, Maps, and Gmail.
 Preview Async Data Client
 -------------------------
 
-:code:`v2.23.0` includes a preview release of a new data client, accessible at `google.cloud.bigtable.data.BigtableDataClientAsync`.
+:code:`v2.23.0` includes a preview release of the new :code:`BigtableDataClientAsync` client, accessible at the import path
+:code:`google.cloud.bigtable.data`.
 
 The new client brings a simplified API and increased performance using asyncio, with a corresponding synchronous surface
-coming soon.
+coming soon. The new client is focused on the data API (i.e. reading and writing Bigtable data), with admin operations
+remaining in the existing client.
 
-The new client is currently in preview, and is not recommended for production use.
+:code:`BigtableDataClientAsync` is currently in preview, and is not recommended for production use.
 
 Feedback and bug reports are welcome at [email protected],
 or through the Github `issue tracker`_.