One thing that I have found with playing around with the various subsystems, is JBoss Web. JBoss Web doesn't expose a thread pool configuration, just a single attribute called max-connections. It also then has an "executor" attribute, which just takes a thread pool name from the JBoss Threads configuration.
So, this one is inconsistent with the other subsystems, and I'm not sure if it should be changed to be consistent or not, since the default doesn't use JBoss Threads. This would also complicate any "global" view in the console.
Andy