Is there some better documentation somewhere for Arduino classes and API's?
What I did/do when loading a new core is generating a doxygen visualisation help class hierachy in HTML. Although most of the core libs have no detailed doxygen documenation the dot/graphviz solves the problem without installation of other IDEs (which also have their specific problems, or need a lot of learning). As an added bonus I can document my source code in a clean and transparent way available in most IDEs and OS.