the planar stuff is really exciting for not simply being the great wheel's vat of generic from the sound of things. Also that last "must be able to name and identify all the planets detailed in Chapter Five" prereq bodes well. As a GM it drives me bonkers when players resist absorbing anything they should need to know in order to play their character while expecting to reap all of the benefits that might link to its fluff & that gives a nice nonspecific hurdle that can be used to push back a bit.