I like the new interface for the 10.1 ArcGIS Diagrammer tool. It is very intuitive, and will be very helpful in building out geodatabases and maintaining our documentation of our geodatabases.
A couple of suggestions I have to improve it:
1. The concept of a list (domain) of fields, similar to the functionality in CA Erwin where they have a domain of fields. CA Erwin doesn't limit you to the domain of fields, but if you add a field to a table/feature class from the domain, and you update the domain, all fields based on that domain are also updated. This would be great functionality for those that work with large diagrams.
2. The ability to easily move fields from one table to another. We have a standard set of fields that go on most of our tables/feature classes, such as LastUser, CreateUser, LastModified, CreateDate and it would be great if I could just copy/paste or drag/drop those from one place to another.
3. Add the ability to export the diagram to Visio (or a standard format that Visio like tools support) with similar output to the ArcGIS 10 version of the Diagrammer tool. We use this quite extensively to communicate internally between people who don't need all the functionality of nor need the knowledge on how to use the Diagrammer tool.
4. The ability to have multiple views of a geodatabase. We have some large geodatabases, which would benefit from the ability to separate some portions of the geodatabase out into more simple views of the different subject area's.
Thank you for this great tool.