Re-phrased the note on the intro of new flag

Co-authored-by: Karen Metts <[email protected]>

Author: andsel

docs/static/monitoring/monitoring-internal-legacy.asciidoc

@@ -7,7 +7,10 @@
 
 deprecated[7.9.0]
 
-NOTE: Starting from version 9.0, legacy monitoring is deactivated and behind a feature flag. Set `xpack.monitoring.allow_legacy_collection` to `true` to allow access to the feature.
+NOTE: Starting from version 9.0, legacy internal collection is behind a feature flag and is turned off by default. 
+Set `xpack.monitoring.allow_legacy_collection` to `true` to allow access to the feature.
+
+Using <<monitoring-with-ea,{agent} for monitoring>> is a better alternative for most {ls} deployments. 
 
 ==== Components for legacy collection