introduction rewritten

docs/docs/flink-writes.md

@@ -374,15 +374,14 @@ orphan files that are old enough.
 
 # Flink Writes (SinkV2 based implementation)
 
-The [SinkV2 interface](https://cwiki.apache.org/confluence/display/FLINK/FLIP-191%3A+Extend+unified+Sink+interface+to+support+small+file+compaction)
-was introduced in Flink 1.15.
-The previous [SinkV1 interface](https://cwiki.apache.org/confluence/display/FLINK/FLIP-143%3A+Unified+Sink+API)
-had some limitations - for example it created a lot of small files when writing to it. This problem is called
-the `small-file-compaction` problem in
-the [FLIP-191 document](https://cwiki.apache.org/confluence/display/FLINK/FLIP-191%3A+Extend+unified+Sink+interface+to+support+small+file+compaction).
-The default `FlinkSink` implementation available in `iceberg-flink` module builds its own chain of `StreamOperator`s  terminated by `DiscardingSink`.
-However, in the same module, there is also `IcebergSink` which is based on the SinkV2 API.
-The SinkV2 based `IcebergSink` is currently an experimental feature.
+At the time when the current default, `FlinkSink` implementation was created, Flink Sink's interface had some
+limitations that were not acceptable for the Iceberg tables purpose. Due to these limitations, `FlinkSink` is based 
+on a custom chain of `StreamOperator`s  terminated by `DiscardingSink`.
+
+In the Flink 1.15 version, [SinkV2 interface](https://cwiki.apache.org/confluence/display/FLINK/FLIP-191%3A+Extend+unified+Sink+interface+to+support+small+file+compaction) 
+was introduced. This interface is used in the new, `IcebergSink` implementation that is also available in the `iceberg-flink` module. 
+The new implementation will be a base for further work on features such as [table maintenance](maintenance.md).
+The SinkV2 based implementation is currently an experimental feature so please use it with caution.
 
 ## Writing with SQL