Looks like we can't reproduce the issue or there's a problem in the test case provided.
Can not set default value for datepickerfield by Architect 3.X
Can not set default value for by Architect 3.X
I want set new Date() to datepickerfield's value by Architect 3.X, But i cannot do that.
The Architect auto create code such as value: 'new Date()', not value: new Date().
UI: Sencha Architect 3.x / ExtJS 4 - 6
Server side: JEE / EJB 3.x / CDI / JPA 2.x/ JAX-RS / JasperReports
Application Server: Glassfish / WildFly
Databases: Oracle / DB2 / MySQL / Firebird
If you like my answer please vote!
We can add initialize function to do that. It's more operation than set the value of config directly.
I hope the Architect tools let the work easier