I do not know how hard this is to create but what would be a timesaver for a lot of us is to create some default content for a rich text field in Designer and have it generated in the Notes client.
For example for new documents I would like to have a table in the rich text field. Nowadays I could create a table via lotusscript in the rich text but then it comes to programming. Especially if you want to have good looking tables it takes much more work.
A timesaver would be to define already the table in Designer and show it in Notes when creating a new document.