The various Spring Web tags and template-URI implementation encourage hard-coding of URLs in the view layer.
If I alter a Controller's URL mapping, I need to remember to go and make the corresponding change(s) in my JSPs so that links and forms aren't broken.
If the spring:url and form:form tags were able to accept the FQCN of a controller bean instead of an actual URL, the tag implementation could determine the most appropriate URL mapping, and (if applicable) incorporate any template-URI params / path variables to generate a reliable URL.
By using the the FQCN, we can rely on any modern IDE to locate references during refactoring, instead of requiring additional help from Spring-aware IDE plugins. IMHO this would fit particularly well with Spring 3.0's annotation-based controller configuration.