The first thing I noticed is that the zoom of the design view of the struts-config.xml file can not be less than 50% this limitation is not useful if the project contains a lot of elements.
This is a bug that slipped the 3.8.4 release, we will get it in a later release. Sorry you ran into this annoyance.
It would be nice if from the outline view of the struts config file one could go to the Java source of the component shown (for example to the Form or the Action source file).
Good suggestion, I will file it.
In my project I use resource bundles to manage the language of the labels shown in the pages, however this labels are not shown in the preview of the JSPs.
We will eventually support this as we get around to beefing up our preview mode.