Looks like I missed this one. Sorry for the delay in responding.
Yes, you can change the default template, but not through MyEclipse itself. All the templates live in under the MyEclipse installation in <myeclipse>/eclipse/plugins/com.genuitec.eclipse.wizards_2.6.2/Templates/Servlet.java. Rather than replacing the default template, you can also add more of your own. The documentation on how to do that is in the ‘docs’ folder in the same plugin.
Please remember that this will be an unsupported configuration so that each time you update MyEclipse you’ll need to reapply your change. On the other hand, if you come up with a killer default servlet and don’t mind us using it, it could become the default. 🙂
–Scott
MyEclipse Support