Hint based routing for write queries

schema router + named server filter possible (has draw backs of no transaction replay +) but as user I want my readwritesplitter + galeramon to support hint based routing in the SQL to direct which node get the writes. based on always-leader, lowest-latency, or a named node.

As a product we'd like to hear from the community on specific use cases, table, schema, data and query to better understand.