However, I occasionally make exceptions when numerous people make requests that I cover the same content. I typically don’t cover content beyond what has made it into official sourcebooks.
My race handbooks are written with an emphasis on the race and the class options which are viable for a player who has decided to play that race and may still be looking for a class which works for that race. My class handbooks are written with an emphasis on the class and the options which work well for the class. Note that the assessments of a class for a race may not match the assessments of a race for a class.