After the introduction of facets the interactive debugger has been extremely unstable. New facets pops up from time to time because web.xml files are found here and there. The configuration of contexts also behaves erratically. Besides the debugger is exceedingly slow (250 secs for a startup of a quite simple configuration!). Of course proper documentation would help, descriptions on how to use the buttons are not usefull, a good rundown of the concepts would probably help though.
Maybe the introduction of facets has been premature, complex projects are probably better of using maven anyway.
Unfortunately I do not see any other solutions to this than foregoing interactive debugging.