Better locale support

While it's possible to set the date format, you have to do so for each date field separately. It would make more sense (IMO) to set the locale on application level and use that as a default whenever you create a new field. The same would be true for currency fields.

As for calendar views, these should allow you to set the first day of the week to either Sunday or Monday.

Having the option to set local date formats should still be an option that overrules the app general format but certainly being able to set a generic format for the app would be very useful, as would the ability for the users to set their own date formats (that they see) from the front end.