I read with interest a recent blog posting by Chris Holmes on Opening Esri and can see similar ideas in many current enhancement requests.

On OGC support I would like to see Esri:

• publish public test URLs for each OGC web service supported by ArcGIS
• make ArcMap an effective WFS Client that can consume WFS-T withWFS v2 support also added
• make ArcMap a Web Processing Services (WPS) client
• have KML/KMZ recognized by ArcMap’s Catalog Window (& ArcCatalog) as file types
• provide support for KML Services in ArcMap
• add KML as a standard layer type (like has been done for CAD)

And while we are talking web services, the Connection to ArcGIS Online should be on-demand  to stop the Find tool opening so slowly so often.

It would also be great to have some public domain and open source options for personal geodatabases like SQLite/SpatiaLite and PostgreSQL/PostGIS and it was heartening to see the former demonstrated at the Dev Summit.

If you are keen to see any/all of the above implemented, then I encourage you to follow the links to find corresponding ArcGIS Ideas awaiting your vote.