The MyEclipse JSP editor works with MyEclipse Web Projects which are based on an exploded WAR folder structure. We are looking into relaxing these restrictions for general JSP editing. The issue is that tag completion is based on knowing what tags your project requires so its not as simple as just opening a text editor with syntax highlighting.
I have not looked at Struts Studio so I can not describe how it may/may not be compatible with MyEclipse. I’ll add it to my agenda of things to look at.
Michael
MyEclipse Support